Press Up, Down, Left, Right at the main menu to enter the code entry screen.
Then, enter one of the following.
SICKJZA - 1996 Supra RZ
IGOTGST - 1999 Mitsubishi Eclipse GS-T
MYTCGTS - 2004 Toyota Celica GT-S Action Package
FIXITUP - Free car repair
RENESIS - Mazda RX-8
GORETRO - Pac Man Vinyl
GOTPOPO - Police Car
SICKGDB - Subaru Impreza Sti
LETMEGO - The first three times you are pulled over in street mode,
you will be released with a warning.