I fired up my PS1 GameShark (v2.1, plugs into the back). I know this isn't the latest version of the unit, but I noticed a "Use Enhancement CD" option in the Explorer. Unfortunately, my later v4.0 CD doesn't seem to be an Enhancement CD. Can this unit be upgraded? I remember that a lot of stuff didn't work on the older model, but I liked having the physical switch. Can I download an ISO somewhere, or does it need to be a retail GameShark CD?
Also, it probably deserves a separate thread, but what's the coolest thing you've done with a cheat device? I haven't messed with these things in years, so I'm itching for some neat stuff to try.