Select the load/save option, and bring up the Password screen. Now enter the following:

Play as Sergei Square, L1, Square, L2, Triangle, R2, X, Circle

Play as Jackal L2, L2, Circle, R2, Square, R1, L1, Triangle

Dance Mix R2,Triangle, X, R2, Triangle, Square, Circle, X

Demo Track R2, L1, Triangle, Square, Triangle, R1, Circle, X

Cheaper Upgrades X, L1, Circle, Triangle, Square, Square, Triangle, L2

Reversed tracks Square, L1, X, Square, R2, X, Triangle, Circle

Mirrored tracks Circle, L1, R2, R2, R1, X, Triangle, L2

Open Mountain Champion Square, X, R2, Square, Circle, R1, Circle, Triangle

Super Snocross 6 Square, X, Triangle, Triangle, L1, R2, Circle, Triangle

Storm Sled w/Jay Circle, Triangle, Square, Circle, R2, L1, X, Triangle

Storm Sled Circle, Triangle, Square, R2, R2, L1, X, Triangle

Storm Sled w/Sergei Circle, Triangle, Square, X, R2, L1, X, Triangle

Storm Sled w/Jackal Circle, Triangle, Square, L2, R2, L1, X, Triangle

Storm Sled w/Tracey Circle, Triangle, Square, Triangle, R2, L1, X, Triangle

Storm Sled w/Gio Circle, Triangle, Square, L1, R2, L1, X, Triangle

Storm Sled w/Nadia Circle, Triangle, Square, Square, R2, L1, X, Triangle

Storm Sled w/Travis Circle, Triangle, Square, R1, R2, L1, X, Triangle