Come to think of it, there's probably no point is using xdeltas. My guess is that most GM modding communities use them to give hosting sites plausible deniability regarding piracy with a kind of "we're only publishing new stuff" mentality. Given the circumstances I'll just stick with posting the data.win.
I went back through the thread to find some sprites to add into the game and ended up using some partial nude sprites for the first zombie and the fly enemies. It's pretty jarring for the shirt to appear and disappear like it does, but with these changes I'm just trying to get a feel for the limitations of UMT, many more sprites will be needed if a full nude mod is to be made.
Here is the data.win with the sprite swap along with the changes I mentioned previously and the source files I used. Just remember that you may need to extract the contents of the big exe so you can use the little exe inside it in order to see the changes.