Secret Vehicles:
At the Title sceen menu, hold R1+L2 on controller 2 and rapidly press the Select button 20 times; you'll hear a signal to comfirm the code. Now you'll find two new planes at the "Airplane Select" screen: an F-16 and a stealth fighter.

GameShark Codes

Infinite Time	801de69c1693

Thanks to Revolution readers Daniel McKinney and Chris Jobson!