Enter the car selection screen in race or trial
mode. Highlight "Class A" and press L1 + Triangle. Quickly highlight
"Class B" and press L1 + Triangle. Quickly highlight "Class C" and press
L1 + R1 + Triangle. If you entered the code correctly, you will hear the
sound of a squeal. Then, a new entry called "Special" will be available
in the car selection screen. This new option allows the bus, Mack truck,
Lamborghini, and scooter to be chosen.