You can put some CAWs on a pak, but changing an in game wrestler doesn't use a pak. If you put a CAW on a Mempak, you can't use them in the game. It's for storage. I can store a CAW, but when I leave Smackdown Mall the CAW on the game is gone, but still on the pak. I play my No Mercy cart with no Controller Pak at all, so it saves on the cart.