Name the brick. (example thisbrick)
Spawn a vehicle.
Type in eval:
_yourbrickname.vehicle.setSha peName("Stuff");
(example _thisbrick.)
Chrono is thinking too complicated.
Look at your vehicle
Say /getid (I'm gonna say 34114 just as an example.)
So we do:
34114.setShapeName("HaHaBitchezImalovingJeep!");
This won't work on a horse or the tank turret, or any other AI player.