Car Showroom
At the Title Screen, press and hold L2 + R1, then press TRIANGLE, TRIANGLE, UP, UP, LEFT, RIGHT, DOWN, DOWN, X, X. After you enter the code correctly, the screen will go black and you'll be able to select any car or boss vehicle to view. Not that helpful, but, if you really want to get an upclose view of the Tank O' Death, you can do so with this cheat.