RE: big, big project
I have thot of doing somthing like you have said for a long time and often become stumped when I get to steering. Three ways I have thot of to steer it is 1. a whole bunch of servos 2. a electric motor ran through a series of gears to slow it doun but then it wont return back to center. On a cupple of epesodes of the show mythbusters they make real cars rc. Maby if you could find a tape of the show it would be usefull.