Original URL: http://www.psxextreme.com/psp-cheat-print/542.html
Race Driver 2006

Codemasters typically makes some solid racing games, so you shouldn't feel too wary about their PSP effort, Race Driver 2006. However, if you need a little help and want the not-so-far edge...

Codes

To unlock all the available series, go to the main menu and input: Up, Down, Up, Down, X, X, Square, Square, Triangle, Circle, Triangle, X