All trucks:
     Pause, then press L1, L2, R1, R2, Square, Square.

$25,000:
     Pause,  then  press  L2,  Square, R1, Square, R1, L1, Circle, L2,
Square, R2, Square, R1.

$1 Million:
     Pause,  then  press  L2,  Square, R1, Circle, R1, L1, Circle, L2,
Square, R2, Square, R1

Normal game speed:
     Pause, then press L1, L2, R1, R2, Circle, Circle.

Faster game speed:
     Pause, then press L1, L2, R1, R2, Square, Square.

Slower game speed:
     Pause, then press L1, L2, R1, R2, Square, Circle.