The kits need to be loaded in the tmp.con. For that you need to pack the map using the map packing scripts from the fh2 main folder.
pack-map.py
Run the script, type in the name of your map, press enter. You need python to run the script, you can easily get that for free from their site. IIRC 2.8.2 is the latest version that is guaranteed to run the script.