Ok, for the Kharkov map jeep nitro mod, I opened the 000 and 003 rfa's and there was nothing in those that controlled jeeps, so I had assumed that they wouldn't be interferring with the code. I also noticed that the server uses Kharkov.rfa and Kharkov_003.rfa, but not Kharkov_000.rfa which IS a client-side file.
I apologize for my noobishness on this stuff
EDIT:
Ok, you were correct... I added it to the 003 rfa and it works. However, the AltFire does nothing because the jeep automatically engages in it's turbo just by moving forward. And, it flies... I ended up going from one side of map to the other in like .5 seconds some 1000 feet off the ground, hehe.
EDIT2:
Ok, I'm a retard, flame away... I set the action to c_PIThrottle...
it still flies though...