Can we lock the player in one position like in tribes 2 intro!

I want to lock a player into a vehicle object, for arguments sake a back of a van, i want him to be able to look around but not move, remember that begining in tribes 2! where you could shoot but not move and your in the back of the flying ship! but you get shot down i want something,like that, also where can i find the way to implemet my player body since last revision it was taken out! i want to be able to see my body!