english deutsch
Game Revolution
http://www.game-revolution.com/games/codes/xbox/tony_hawk_pro_skater2x.htm
Cheats for the game.
IGN
http://codes.ign.com/ob2/068/015/015813.html
Describes how to unlock levels.
Level 80
http://www.level80.co.uk/xboxtony.htm
Cheats and hints for the game.