Uh-huh. I suppose it would depend on what is meant by "do" in this case. I certainly don't intend to widely publicise or attempt to sell anything thus created. I'm doing this mostly for my own entertainment, and for my own love of the original game; however, I figure there might well be other people out there who would appreciate what essentially amounts to a new expansion pack. Sort of in the same vein as the level packs which are already available, except more... complete. :-) People on this forum and similar sites seem to share a lot of cracked games and related info, and don't seem to have too much trouble with the law, so just wondered how careful I need to be.
In case I do need to go down the data-extraction route, it'd be awesome if someone on here could give me a few pointers on the copy protection... ;-)