Sled Storm

Enter the options screen, select the load/save option, and display the password screen. Then, enter Circle, Triangle, Square, R2, R2, L1, X, Triangle as a password. The Storm Sled will be selectable in single race mode.

To get this game:
http://www.gamecave.com/default.asp?source=uddm&sku=021PSXSLEDST
(Information from Cheat Machine)