The answer is "yes". You would need the help of a Mod to pull it off, though unless that Mod has changed MUCH of the physics in FPSC it would not be entirely feasible to make a driveable vehicle.
I made a video and posted it on YouTube showing off a driveable vehicle in FPSC, but the entire thing (although fun in its own way) just doesn't flow well with the rest of the engine. The vehicle physics just aren't there, you can't do any jumps with the vehicle, or even get it to tilt for that matter.
Hope that sheds some light on the subject.
The one and only,
Only those who sow the seeds of their desires will reap their benefits later.
However, I have seeds of my own to tend to. I don't have time to be someone else's watering can.