Need for speed most wanted cheats help pc?

listen I have cheats http://cheats.gamespy.com/xbox-cheats/need-for-speed-most-wanted/
but I cant input in the game that cheats
in my computer I have gta vice city and I only click enter
what I must click in most wanted to start writing cheat

sorry for my bad english
;)
thenks
4 answers 4