This would bge a question for the Hybrids and Gameshark forum, so I'll move it there. In short answer, yes you can do it using an enthusiast-written utility that lets you tinker with your garage after Sharkporting it out to your PC.
Originally posted by Jaguar_XJ220_2002 Is there any way to mod cars with the use of GameShark or CodeBreaker to change colors and wheel size, etc. If so, how? Thanks.