Boy... it's truly been a while since I played W&W, although I still remember it (and the frickin' video challenges).
In today's world, I'd be inclined to see about getting a VMWare image of Win98 and play the game in there. That would be far, far easier than trying to retrofit lost code.
I suspect I'll be doing that, since I've just about got my son hooked on Might and Magic... W&W isn't far behind