Ford Racing Cheats

Start a new career and enter MARK MARTIN as a name. Go to the first race in the KA series and do the qualifying and then the race. Your car will be invisible.

Start a new career. When asked for the player name, type GIMMEGIMME for your name. Make sure it is in all CAPS.
This will give you ALL of the cars available in the game. This can not be used for quick race, only for career mode.
This code works in the European and U.S releases.