Expert difficulty adjustments:
Finish championship mode with in professional mode:

Extreme difficulty adjustments:
Finish championship mode with in expert mode.

Unlock Downloadable Extra Cars option:
Win the WRC with in novice mode.

Type one of these codes as a new profile name:

Effect - Code
Flying Camera - DOVECAM
Enables Supercharger Cheat - MAXPOWER
Extra avatars - UGLYMUGS
Ghost car cheat - SPOOKY
Reverses controls - REVERSE
Time trial ghost cars cheat - AITRIAL
Unlock Everything - PADLOCK

Unlock Vehicles:
(Ext: Extreme, Nov: Novice, Exp: Expert, Pro: Professional)

Xsrara WRC Evolution 3 - Beat the WRC Championship on exp. degree
Xsrara WRC Evolution 2 - Beat the WRC Championship on pro. degree
Xsrara WRC Evolution 1/2 - Beat the WRC Championship on nov/pro
Xsrara WRC Evolution 1 - Beat the WRC Championship on nov. degree
Xsrara Extreme 05 - Beat the WRC Championship on ext. degree
Lancer WRC05 Scott Evolution - Beat the WRC Championship on exp. degree
Lancer WRC05 PTC Evolution - Beat the WRC Championship on pro. degree
Lancer WRC05 Hot Wheels Evolution/PTC Evolution - Beat the WRC Champ nov/pro
Lancer WRC05 Hot Wheels Evolution - Beat the WRC Championship on nov. degree
Lancer Evolution Extreme Max II - Beat the WRC Championship on ext. degree
Impreza WRC 2005 Spec C - Beat the WRC Championship on exp. degree
Impreza WRC 2005 Spec B - Beat the WRC Championship on pro. degree
Impreza WRC 2005 Spec A/B - Beat the WRC Championship on nov/pro degree
Impreza WRC 2005 Spec A - Beat the WRC Championship on nov. degree
Impreza Extreme 05 - Beat the WRC Championship on ext. degree
Focus RS WRC Evolution 3 - Beat the WRC Championship on exp. degree
Focus RS WRC Evolution 2 - Beat the WRC Championship on pro. degree
Focus RS WRC Evolution 1/2 - Beat the WRC Championship on nov/pro
Focus RS WRC Evolution 1 - Beat the WRC Championship on nov. degree
Focus Extreme 05 - Beat the WRC Championship on ext. degree
Fabia WRC Evolution 3 - Beat the WRC Championship on exp. degree
Fabia WRC Evolution 2 - Beat the WRC Championship on pro. degree
Fabia WRC Evolution 1/2 - Beat the WRC Championship on nov/pro degree
Fabia WRC Evolution 1 - Beat the WRC Championship on nov. degree
Fabia Extreme 05 - Beat the WRC Championship on ext. degree
307 WRC Version 3 - Beat the WRC Championship on exp. degree
307 WRC Version 2 - Beat the WRC Championship on pro. degree
307 WRC Version 1/2 - Beat the WRC Championship on nov/pro degre
307 WRC Version 1 - Beat the WRC Championship on nov. degre
307 Extreme 05 - Beat the WRC Championship on ext. degree