Hey im, i just bought NFS carbon: own the city for my psp, and uh, i was looking up cheat codes because i?

couldn’t figure out the game at a certain point, anyways when i went to puy in those cheat codes 1.) i didnt know where to put them in at and 2.) they wouldn’t work does any one have an idea of what i am talkling about? And i was wonderin gif anyone out there could help me with my problem and if they could it would be greatly appriciated

-Thxz in advance

PSP Sites