Go to the main menu and enter one of the following cheats:
Best Buy Car Vinyl: Up, Down, Up, Down, Down, Up, Right, Left
Burger King Vinyl: Up, Up, Up, Up, Down, Up, Up, Left
Extra $200: Up, Up, Up, Left, R, R, R, Down
$1000 for Career mode & RX-8 and Skyline for Quick Race: Left, Left, Right, X, X, Right, L, R
Unlock Hummer H2 Capone: Up, Left, Up, Up, Down, Left, Down, Left