Oh wow! There are others!
Cadaver was the very first game I bought on my own money, I've been a big fan of it ever since I saw the walkthrough in an old pc mag
Anyways, I actually started working on the datafiles about 2-3 years back, but due to work stopped after I got the rooms to display.
I'm still interested in the effort though and would love to help you guys out in mapping the data files! You're way ahead of me, so if you have some docs about what's mapped and what's missing that would help a lot.
We could also possibly open a wiki page for it in the xentax game format wiki so it's easier to work on.