Game Inhancer help
 

Hey, I have a GameShark 1.92 which plugs into the back of my playstation (In the I/O Port) I was told that THIS DOES PLAY BACK-UP games, but I don't know how it works, could some one please help me, I understand I am supposed to boot one of my games, then swap to the Back-UP game, but I've been trying this for some time now, N-E idea's when are u supposed to switch games?