which Action Replay do I need?

[3sc0b4r]

I couldn't find a GS on eBay, but if I get you right any AR 2 version besides the newer V 2 ones will do?

The sticky says, that in order to boot a DVD-R I need an original DVD Game (High Toc).

Can I take one game, Gran Turismo 3 for example, and boot any DVD-R backup I like to play or should I always swap with the corresponding original, e.g. MGS 2 original > MGS backup, DMC 2 original > DMC 2 backup?