Instructions
Load your Action Replay software into the PlayStation 2 and allow it to load to the home menu. Go to the Cheats menu and pick the game you are about to play, then choose the codes you want to use for that game.
Insert your Swap Magic disc when you are prompted to load the game disc. Wait for the Swap Magic screen to load.
Eject the Swap Magic disc when you are prompted to switch discs. Load your backup copy of the game into the PS2, then press "X" on your controller to load the game.