The PS2 Memory Cards come with two different stickers, both for the front and top-side, so what's the big trouble with organization? If you fear for the sticker's value, just write something on a clear peice of tape, as it hardly ever leaves residue. Other than that I'd just put the memory card in and find out which saves are which. For me this is no problem, since I use my second PS2 mem card as a backup.