You should check out "Night of the (Walking/Living/___?) Dead." I found it to be an excellent module, full of opportunity for creepiness and with enough combat to please the average fantasy gamer. It would be a simple matter to change any references to the Grand Conjunction, thereby making the module pretty much 100% generic. Obviously, you'll have to ignore calls for Horror checks and whatnot, but I'm sure you expected that.
If you have doubts about the module, read the reviews on the Kargatane website. I think you can link to it through the Wizards site as the official Ravenloft website.