Cheat mode
At the main menu, press Triangle(2), Circle, Triangle, Circle, Triangle, Square, Triangle, Square, Triangle to unlock all cheat options.
Lamborghini Miura
Successfully complete the game to unlock the Lamborghini Miura in free ride mode.
Level select
Pause the game in career mode, then hold R1 and press Triangle, Left(2), Triangle, Circle, Up(2), Square to unlock all levels in career mode.