Maybe you could be able to program it in but make it react like a weapon. So you load the model of inside (or on top of) the vehicle into the weapons section, then have the projectile coming out a bazooka or something. If theres a tank make a model of the tank and make it look like you are looking from at the top by the gun and you control where the gun is aiming (add somesort of code that stops you from lifting the gun to high) and then have it say as the wasd keys control your driving.
Or have just got the FPSC engine completly mixed up.
Look into my eyes I am free, your just a wannabee (suck on that rudey scum).
Jak 2 Rules! ! ! !