I stumbled upon a mint and complete copy of Skeleton Krew on Half.com, so I no longer need that manual. Would still be interested in upgrading from my worn Zombies Ate My Neighbors one though.
Also... If anybody's interested, I do have the other copy of Skeleton Krew I'd be willing to sell fairly cheap. It was apparently a former rental, so it does have a couple cosmetic issues, but I have verified that it works. There's no manual, but it does come with it's case. If you're interested, feel free to send me a messages and I can give you more details.