Okay, so I was at my folks' house for vacation and I stumbled across a copy of Diablo II at the local Goodwill, complete with (slightly tattered but still in pretty good shape) box. I never got around to playing Diablo II back in the day, so I picked it up, and I used my parents' (crappy) scanner while I was there. The box was a bit scuffed and the scanner was a cheap Canon LiDE, but after a lot of time and Photoshop work (cleanup, despeckling, etc, etc), I came out with a really good cover. I've uploaded versions with and without my template, since I understand some people might want to stick close to the original. This is the first cover that came from a scan that I did myself (and I don't see myself doing too many more, since I can only use the scanner at my parents' house and I'm not there that often).
Since it came in a cardboard box and not a STACKPak, the cover bears some fold marks, even after cleaning up with Photoshop, but with this particular cover art I think they actually fit in well. I had to do some minor scaling to make the cardboard box art fit the slightly smaller STACKPak template, but I didn't skew anything: all aspect ratios remained the same. I wouldn't want to mar Diablo II's wonderful boxart.
Without further ado:
Without templateWith templateEnjoy!
Oh, and if anyone sends me a free copy of Lord of Destruction, I promise I'll do a cover for it.

EDIT: Oh, and in case you're worried: yes, Diablo II's gigantic, inch-thick manual will fit inside a StackPak along with the game discs.