Hi chaps. Thought I'd sign up and say what a great mod I think you've created here. I work for a game developer in the UK, and theres now a hardcore of us who play the coop mode at lunch, (No internet access for us drones so we have to settle for Lan games). Just wanted to tip my hat to you, as its a scream to play!
Oh and please, please get around to getting us some more navmeshed maps. We need em!
Cheers
Anglo