LGT(Leo's Games Tools)

I suppose all I can do right now is to export car main body with the alpha texture of course(I suppose you're not interesting in lower polygon models do you?) to *.OBJ and put a wheel in it as well, then all you'll have to do is to clone that wheel rotate/scale/pos each of them in 3d modeler that you're using, if it's ok with you I can proceed with that.