I have already a Action Replay 4in1 (and modchip) although it's an early revision unfortunately so I will have do do a modification on it in order for it to run 4meg Saturn games. Also I have not been able to get cheat codes to work with it on my Pirated-copied CDR games (maybe that will also work after the mod?). Anyway the original Interact Gameshark seems to be a little more rare than the Pro 4in1/5in1 carts and was wondering if any of you Saturn collectors actually HAVE a Saturn Gameshark? If so could you inform me:

Is the 4meg on board just for storage saves OR does it run 4meg games also?
Do the cheat codes work on CDR games? (I'd say "backups" but I know I will be corrected so I'm telling it like it is)
Lastly, does it boot different region games? (I heard it does with a code)?

Thanks guys!