In case anyone wants to find out more, check out this interesting thread
http://blog.system11.org/?p=1442
Oh, that's pretty neat, actually.
I played Metal Slug 2 and X quite a bit at laundromats/delis and I simply accepted the slowdown in MS2. Now, however, I must admit that it would be great to see how the game would play with this modified code.
ONE THING TROUBLES ME: Will I still be able to drink a Diet Coke and have a slice (or three) of pizza whilst I leisurely waltz through Metal Slug 2? Or will I have to put down my pizza? I would never put down the Diet Coke, of course.