All Cars and Tracks:
To gain access to all the cars hold Select and press
L1, Left, L2, Right, L2, Left, L1, L1at the main 
screen.

Codes:
For the following codes select Single Race or World 
Tour mode. At the transmission selection screen, 
hold Select and press one of the following codes:

School Bus - L1, Up, L2, Down, Down, L2, L2, R2. 
Ice Cream Truck - Select and press R2, L2, L2, Down,
Down, L2, L2, R1. 

Black Widow Truck - Select and press R1, L2, L2, 
Down, Down, Up, L2, L1.