i'm new at this please help

[swoop]

I have a ps one with the gameshark card. I have read all the instructions on copying and tried it a couple times, and could not get them to work. Do I also need a mod chip, or can I use just my gameshark card for the front of my player. and what do I do with it, just swap cd's. Does any cd from USA work to boot the playstation, or do I need the boot disk that has been talked about in this site?