At the white Infogrames screen press Up, Down, Triangle+Circle. The words "Lock Off" will appear.
Now quickly hold one of the following cheats until the Infogrames logo disappears. A message will confirm entry:
Left + L1Unlimited Time Left + L2Narrow Tracks Left + R1Rollercoaster Track and Jeep Left + R2Restart Race Left+R1+L1+R2+L2All cheats
Hold Left + R1 until the Infogrames logo disappears.
Rollercoaster Style Track:
Use the cheat to get the hidden jeep, then, when in the game, go to either Championship or Time trials, and go to Sweden. Go to Stage 1, and a screen should say, loading ???stages. You will then be racing on a Roller Coaster style track.
Thanks to Revolution readers Jeremy Russell, Marcus Darp", Jesse Sines, Andrew, Cliff, Philip, Michael Schumache and LoBo!