CWCHEAT

go to http://cwcheat.consoleworld.org/
download the latest version of cwcheat
you will need a custom firmware to use this
after downloading, open it using winrar
take out the folder install or install_371(this is for 3.71 m33 users)
take out the seplugins folder and place it at the root of your psp
now reboot your psp while holding R button
go to plugins and enable all the things there
exit and play any game now
when the game is fully loaded, hold select for about 3 sec and a menu will pop out
then press select cheats and enable them
then press enable cheats exit now and ur game will have the cheats now



*NOTE root of psp is not mp_root
*NOTE some games require u to get those cheats yourself