Car designs

[mknabster]

I would like to start trying out designing vinyls for cars, as part of a custom paint job, at least in Photoshop or some simliar program. I also wouldn't mind trying to design body kits too, just to see what's involved. So does anyone know if there are any CAD softwares out there that i could possibly have a default car rot design stuff on, or would i be able to do this in any of the Adobe products?