Various cheats
     Enter the following codes at the main menu:

Unlimited Nitrous: 
     A, B, Y, Y, A, A, B

Unlock All Circuit Tracks: 
     Down, R, R, R, BLACK, BLACK, BLACK, X

Unlock All Drag Tracks: 
     Right, X, Left, R, X, L, WHITE, BLACK

Unlock All Drift Tracks: 
     Right, Right, Right, Right, Left, BLACK, R, WHITE

Unlock All Drift Tracks: 
     Left (4x), Right, Black, R, White

Unlock All Sprint Tracks: 
     Up, BLACK, BLACK, BLACK, R, Down, Down, Down

Unlock Drift Physics in All Modes: 
     R1, Up, Up, Up, Down, Down, Down, L1