With a ci slot you can add a hardware cam like diablo or dragon. There are also nds plugins for use with a phoenix interface, so its possible and others do it. Unfortunately i dont have one so cant give more advice than that, but I am sure you can find more info.
you can use a phoenix interface with original s*y card. you need multidec, newcs and wincsc all together to decrypt it, with a media app that can accept plugins. i use gbpvr.