Just an update on this...
I had a friend over on the Rebirth forum do this for me (I was kinda busy working on the installer). When the LOTW were originally released there were quite a few that didn't work, and never would. Then there were a good many more that SHOULD have worked, but had a few minor issues. As of right now the state of the LOTW, is almost all of them work, but there is still a handful that doesn't.
Here's a list of all the Levels of the World that don't work:
agitatio.msn (has no *.hog or *.rdl file; not fixable)
_dlow.msn (tries to open the "Training Camp" mission, but crashes because the *.hog file has a different name than the *.msn; "tcamp.msn" loads Training Camp correctly, so probably no need to fix this)
bdrome10.msn (*.msn file is made of deformed chars; mission doesn't appear in the list; writing my own *.msn file caused it to appear, but starting the mission crashed the game)
deepfrst.msn (same as above)
hd.msn (same as above)
interim.msn (same as above)
icesewer.msn (uber processor-killing freeze ... )
seals.msn (multiplayer mission; has a clean *.msn file, but crashes upon starting)
temple2.msn (same as above)
The rest of the files have been cleaned and are working nicely. I've updated the original link with the new LOTW.
Just to let you know, we haven't entirely given up hope on these missions...we're working to see if they're at all salvagable. If we ever do get them working I'll update here immediately :)