Things You'll Need
Instructions
Remove the battery from the PSP.
Insert the battery into the slot on the Action Replay battery enabler.
Press the button on the battery enabler. The left light should be lit.
Remove the battery from the battery enabler. Place it back into the PSP slot.
Insert the Action Replay memory card into the slot on the PSP.
Turn on your PSP and wait for Action Replay to boot up.
Insert the Need for Speed Carbon: Own the City UMD when prompted.
Press the "Start" button to start the game.
Press the "Home" + "R" buttons while playing the game to bring up the different cheat codes for the game.
Enter the code you want to use by highlighting it and pressing the "X" button.
Press the "Home" button to return to the game. The cheat code will go into effect immediately.