I also got a CTD on Goodwood 16, about 5-10 minutes after starting the game, playing as Allied. I'll try it again later to see if I get similar results. I also get CTDs on Goodwood 64 and Anctoville, but not (so far) on any other Normandy maps.
I've no idea what the cause of the problem might be, other posters have suggested it might be due to the AI pathfinding for a particular building model. I assume it isn't vehicle-related, as there aren't any in Anctoville or Goodwood 16.

Big favor here. Any chance of getting bots to use the divehorn? I know its not important at all. But it certainly would be icing on the cake. Pretty please.

I'll definitely have a look into this (once I've released the next mini-mod version) though I'm not sure if it'll be possible. I'm not sure if there's any way to get the AI to trigger the dive horn at a particular point - since it uses the "afterburner" key, bots might be more likely to use it in situations where they'd have used the afterburner/speed boost in vanilla BF2.
One workaround might be to modify the Stuka sound scripts so that it automatically makes the dive horn sound when diving at speed (all BF1 aircraft had a Stuka-like dive sound, IIRC)

I think I've fixed the "backwards bomb" visual bug caused by this fix, by adding invisible "launcher" objects in the same location as the bomb models, which act as the "barrels" for the bomb weapon. I think this means that bombs don't disappear from aircraft wings when dropped, but this isn't too noticeable when they're in the air (it's better than the bomb models being back-to-front, anyway  )

I'll release a new version of my AI tweak mod soon, including the bomber fix as well as some other changes + tweaks to the AI, particularly tank shell + MG use.

Woohoo! Thanks Drawde! You are making real progress!!

Unfortunately NOT much progress with plane AI   although I think I've managed to get tanks working reasonably well.

Bots definitely seem to use handheld LMGs more effectively than they used to, though getting them to use deployable weapons sensibly may be beyond BF2's AI limitations.

Also, infantry weapons have the highest priority for AI mortars, with heavy armour the lowest... seems to be another example of the AI doing exactly the opposite of what the game files tell it to do.

I -think- I may have solved the problem with the Stuka's kamikaze diving, it appears to be caused by the AI input to select the rear gunner position (in objects.ai) being set to PIMenuSelect2 (which should be the key to switch between 50kg/250kg bombs), rather than PIPositionSelect2. I added the bomb select key (missing from the default files). This didn't cause any problem in default FH2.25 as there was no bomb select key in weapons.ai, but I added one (without spotting the error in objects.ai) so presumably when the bot pilot got within range of the enemy and attempted to select a bomb type, he instead started switching between the pilot and gunner seat, causing the plane to crash.

Fixing this error makes the Stuka much less prone to crash into the landscape, but it still flies very sluggishly, doesn't attack anything, and usually ends up getting killed by flying out of the playable area.  The AI control input parameters for the Stuka are also set to be much less sensitive than other aircraft (including the Ju52); I suspect this is the cause of the latter behaviour, so will change it and see what happens. Still no guarantees I'll be able to get bombs working, though...

I haven't really looked into the fire rate issue with semi-auto rifles yet, but I suspect it's because these guns don't actually have a fire rate defined in their .tweak files, they fire as fast as the player can click the mouse button. Since bots don't need to use a mouse, they can fire them a lot faster than a human player 
 
I've also done some more tweaking to the tank gun + MG files, and have made a couple of changes that seem to make tank vs. infantry combat work better; firstly, I gave AP shells a strength of 0 vs. infantry for all tanks that have HE shells, secondly I gave coax MGs a much higher strength (15) and reduced their range to 150. Within this range tanks will prefer to use MGs rather than shells against infantry, beyond it they'll fire HE shells - at least in theory. I think part of the reason for the erratic behaviour of tanks was that HE shells and MGs had a similar strength vs. infantry, the bots couldn't decide which to use!
I've also reduced the minimum range of AP shells to 1 and HE shells to 5.

Thanks to all for the comments, criticism and suggestions. I'll hopefully be able to fix/improve some of the issues in future versions.

A few things I ought to mention first:

- The mod doesn't (currently) change any of the basic AI scripts, or the AI scripts and pathfinding for maps. It only affects the AI data for vehicles and weapons.
- There are also absolutely no changes to weapon or vehicle data (damage, fire rate, vehicle handling, etc.)
- Most of the issues mentioned are not caused by deliberate changes made in the mod. Some of them are problems found in the default FH2.25 AI which haven't been fixed, and others (such as the AI not using MGs, and the extreme range of bazooka/panzerschreck bots) seem to occur despite changing the data for the opposite effect.
Other issues - such as the behaviour of infantry bots - may be caused by changes to one area of the AI data causing subtle (unintended) changes to other aspects of the AI. The BF/BF2 AI system seems to be so complex and buggy/glitchy (presumably as DICE didn't put nearly as much effort into developing and troubleshooting it as with other aspects of the game engine) that it can be very hard to predict how the bots will behave, regardless of what the AI data files tell them to do!

I'll attempt to answer some of the individual issues here:

Bots not bailing from vehicles or changing crew positions: this issue was present in the default FH2 2.25 AI (referred to as "default values", "default FH2" etc. below), I've made a partial fix for it by giving passenger seats + tank rider positions a very low priority for the AI, so they rarely bother using them. The "vanilla" BF2 bots seem to know how to use APCs, transport helicopters, etc. properly - so hopefully this issue will be properly fixable in future, either by me or a more experienced AI modder.

Tank shell use: I've tried my best here, not sure if it's possible to improve this aspect of the AI or whether the BF2 AI just isn't capable of intelligently selecting different armament types for the same weapon (which weren't, IIRC, a feature in vanilla BF2). 
For the AI "strength" values in weapons.ai, I've set AP shells to have a high priority vs. tanks, medium priority vs. light armour (guns, trucks, APCs) and low vs. infantry. HE very high vs. infantry and light armour, very low vs. tanks, APC/APDS/HEAT very high vs. tanks, very low vs. everything else, Canister very high vs. infantry, very low vs. everything else.
However, the AI's selection of shell types seems to be very haphazard/random at best. I've sometimes been shot at with HE when on foot or manning a gun, but at least as often with AP (to be fair, the bots are pretty good at killing AT guns with only AP shells). For now I'm just happy that (unlike default FH2, most of the time) they do use multiple shell types, and will (sometimes) fire at infantry + guns with both MGs and shells at the same time!

AT guns firing AP rounds at infantry: I'll definitely fix this, setting the "strength" value for non-HE shells to 0 vs. infantry should do the trick. AT guns definitely shouldn't waste time and ammo firing at targets that they have almost no chance of hitting, especially when this might mean they don't notice more important targets!

Tanks with 20mm not firing: Never noticed this myself, I've been killed by these (and the Fiat L6/40) plenty of times, in tanks, on foot and manning AT guns. The behaviour and aggressiveness/awareness of AI tanks does seem to be very variable though, even on the same map.
Regarding the Pz.II not firing at close range, this is probably because of the minimum range value, which I set to 2 or 2.5 (less than the default FH2 which is 10), I'll try reducing it to 0.5 or even 0 for non-HE shells.

Vehicles firing at aircraft: This is intentional - light vehicles with fast-firing weapons have their "anti-aircraft" value in objects.ai set to 2, which, according to what I've read on BF2 AI coding, means that they'll take "opportunity" shots at planes that fly into their field of view, but won't actively chase after and track them (as they would if you set it to 1). I've shot down quite a few planes with PzIIs and Marmon-Herringtons myself, so it seems only fair that the AI gets a chance to do the same!
This isn't a new idea/addition of my own: a number of vehicles in default FH 2.25 have this setting (including those with heavier guns, not very practical for AA), I just made it consistent (all heavier tanks have the anti-aircraft value set to 0)

Marmon-Herrington AC not firing at infantry: I'll look into this, there definitely seem to be some AI issues with this vehicle - even in default FH2 it tended to drive around not firing at anything. I've definitely seen it fire at tanks.

Bots not using stationary MGs: This is one issue that's really annoying me and I still haven't worked out why it's happening - the AI's use of AT guns is very good, but they still don't seem to understand MGs. I've given all stationary MGs high "temperatures" (which affect how likely the bots are to use vehicles and other PCOs) as well as the highest possible defensive "strategic strength", and have also given the actual MG weapons a very high strength vs. infantry in their weapons.ai files.
I have to say that I very rarely saw bots using stationary MGs in default FH2 - but whether or not my mod has made things worse, it certainly hasn't made them better! I'd really appreciate any advice from more experienced AI modders.

Bazooka/panzerschreck ranges: I noticed this too (the fog in Luttich makes it particularly noticeable). I've set the AI maximum range for these weapons to be substantially LOWER than the default values, so I'm not sure why this happens. It may be because the default minimum ranges for these weapons were so high that bots rarely used them, making the issue less noticeable.
Lowering the maximum range even more should help. What was the real-life effective range of the bazooka, panzerschreck and PIAT considered to be?

Semi-auto rifle fire rate: Seems weird, I'll definitely look into this. I haven't intentionally changed any of the rifle values, other than a few tweaks to the min/max range. Currently I haven't changed the AI data for any small arms much - only tweaking the min/max ranges and in some cases adding an "effective range" value so that bots are more likely to close in with weapons like SMGs and pistols.

Bot use of AT mines and grenades/charges: All AT/AP mines now have AI strength for all weapons set to "0" which should prevent bots from using them, certainly I haven't seen the "engineer mine charge" since changing this. I've changed the AI data for AT charges and grenades (e.g Geballte Ladung, sticky bomb) so the bots should be able to use them (previously, the min/max ranges made it very hard for them to do so) and I've certainly seen occasional kill messages for AT grenades and satchels.
Another issue is that there are still far too many AT bots around, even on infantry-only maps! I'm not sure if bot kit selection is alterable, or if it's random/hard-coded.

Aircraft strafing: I agree that planes (other than the Hurricane IID) definitely shouldn't strafe tanks with their cannons, they can't do any damage even if they hit anything. This will be easy enough to fix by setting the AI strength of their guns to 0 vs. heavy armour. IMHO strafing of infantry and light armour/soft targets (AT guns, trucks, jeeps + APCs) should be kept in, especially with 20/30mm guns (even strafing with MGs can kill exposed gun + vehicle crew)
Unfortunatly, lightly armoured vehicles like the Vickers Mk.VI and SdKfz.222, which heavier aircraft guns might have a chance of hurting, are still classed as "heavy armour" so there's no way to allow planes to attack these without also having them strafe heavier vehicles that are immune to their fire.

Aircraft bombing, Ju87 behaviour: I haven't yet worked out how to get AI planes to drop bombs. The odd behaviour of the Stuka (crashing into scenery, kamikaze dives) appeared to be just as bad in default FH2 - again, I yet haven't looked into why this is happening. The issue of the Stuka dogfighting with enemy planes will probably be less noticeable when/if it can use its bombs (so the AI can pay more attention to ground targets). I haven't changed the performance/handling data for the Stuka or any other planes, the only changes are to the gun + bomb AI data.
Bots are lethal with aircraft bombs in vanilla BF2, so this issue should be fixable. It hasn't been broken by a BF2 patch, either - I have BF2 patched to the latest version and regularly get bombed by AI aircraft, though they don't understand the TV-guided missiles (not a problem for FH2!)

Mobile AT gun issues: I've set them to be rotateable but immobile (in objects.ai - doesn't affect player control of the gun, only bots), so far I haven't seen any problems. Bots seem to be able to rotate them in place, the same as with static guns. But the AI's behaviour does seem to be very variable!

Radio/map commands: I haven't made any attempts at fixing this area of the AI yet, and have only just started looking into it. I'm hoping to eventually get the ability to command bots closer to how it was in vanilla BF2; I'm guessing the main cause of the problem is that when the "comm rose" was replaced, the FH2 developers didn't add the AI trigger commands into the scripts for the new radio comm interface.

Mersa Matruh, and general AI map issues: This is definitely one of the more "broken" maps AI-wise (though maybe not as bad as Supercharge where the Allied AI seems to be unable to understand how to get into the walled town that's the main German base). But my experience with Mersa Matruh (playing as the Allies) seems to be the opposite of djinn's. The German tanks all park on top of the hill overlooking the town and "snipe" anything they can see, on foot or in a vehicle, using both HE and AP! Deadly as this is, it still isn't very effective in the long run as most of the tanks don't go in to cap flags (even the railway station) and they eventually get picked off by the few Allied tanks + AT guns that manage to avoid getting sniped.

One persistent issue I've noticed in a lot of maps is the "traffic jam" where multiple stationary tanks and vehicles sit in a group, usually in between their base and an enemy's, and often in a position where they can't fire at anything. This ties up a lot of bots and vehicles that could otherwise be fighting and capturing CPs, and would make a very good target for bombers if the AI actually knew how to drop bombs! I suspect this is purely a map AI scripting/navmesh issue and changing the basic AI will have no effect.

Anyway, I hope this has answered some of your questions -even if it ended up as a (very) long post.

9/ The semovent is ALIVE!
10/ Tiger seems alot more maneuverable, hardlyh showing is back to the enemy

What maps are the Semovente and Tiger on? I assume there's a Tiger on Goodwood, but I've never played long enough (due to crashes) to see one. The only Italian vehicle I've seen is the Fiat L6/40.

DOWNLOAD LINK (v1.0)

I think I've playtested it enough now to make sure that the AI is still working correctly, so here's the first version of my SP AI tweak mini-mod for FH2 2.25.

From the readme.txt:

FIXES:
- Bots now aim and fire AT guns and mortars.
- Fixed the error with the the Sherman roof-mounted MG which caused the "Luttich" map to crash in SP mode.
- Tank HE shell min/max ranges are now consistent with those for AP shells.
- US 57mm and 76mm AT guns now have the correct AI files for mobile and static versions.
- Disabled AI use of AT mines (bots don't know how to use them correctly, so just get themselves killed charging enemy tanks)
- All open crew positions on vehicles and guns now have the "exposed soldier" setting so the AI will fire MGs and small arms at them.

CHANGES, TWEAKS + ADDITIONS:
- Completely revised the weapon AI data for all vehicle and AT gun/artillery weapons. Vehicles will (most of the time) use both MGs and shells against infantry targets and guns, and will prioritise AP, HE and special AP shells for different target types. Bots manning hull and cupola MG mounts will fire at their targets more reliably,
- Adjusted the AI data for infantry weapons. Changes to "small arms" (rifles, SMGs, MGs etc.) are minimal, but AT weapons (including grenades and explosive charges) have been tweaked significantly.
- Aircraft will strafe ground targets more, and (except for the Hurricane IID) will prioritise infantry and light vehicles. Still can't get them to drop bombs, though.
- Adjusted the "strategic strength" and "temperature" values in vehicle AI files, so bots are more likely to select vehicles and crew positions based on their effectiveness.
- Bots will avoid using (unarmed) passenger + tank rider positions on vehicles - they rarely know how to use these effectively, or when to get out, making them deathtraps.
- Bots will not attempt to move mobile AT guns (other than turning them in place) - as they don't really understand how to use mobile guns properly (treating them like extremely slow tanks).
- Bots will now fly spotter planes (they don't know how to use the artillery spotting ability, but the "radar" effect is useful for the player)
- Added unique AI files for vehicle + gun types that were either missing them completely (e.g. Cromwell, Churchill) or which used AI files from another vehicle of the same basic type but different function (e.g Opel Blitz Flak, SdKfz.251/10)
- Vehicles (and other PCOs) of the same basic type (e.g. all Sherman variants other than the Firefly and M4A1/76mm) now share object and weapon AI files. Static and mobile versions of AT guns now also share weapon AI files, though they have seperate object AI files.

KNOWN PROBLEMS (other than the usual BF2 AI issues, and pathfinding issues - such as tanks getting stuck and aircraft crashing into the ground - which are dependent on map scripting)
- Aircraft don't use bombs/rockets, despite all my attempts at getting them to do so. Maybe in the next version...
- Bots don't use static artillery (25pdr, LeFH18, US 105mm, Nebelwerfer) - although they will use emplaced mortars.
- Bots rarely seem to use static defensive MG positions.
- Bots don't fire certain vehicle gun positions (such as the Vickers .303 on the LRDG Chevy, and the rear MG34 on the SdKfz.251) although they will man them.
- The "Goodwood" map still crashes after around 15-20 minutes.

Now I've got a basic playable version out, I'll work on more AI fixes for the next version - including artillery, aircraft bombs and radio commands (no guarantees I'll be able to get any of these to work, but I can try!)