A wrap as its better known can be designed in photoshop, illustrator, corel draw, basically any program.
We print ours with large format solvent printer. Its printed straight onto a comformable cast self adhesive vinyl (technical term for massive sticker ).
Its then applied to the vehicle by sign technicians using a heat and stretch technique. Takes a lot of practice. some more http://www.coedesign.com.au/vehicles.html
If youve got any other questions regarding wraps let me know.