Old-timers may remember this ancient thread. They'll also remember that nothing came out of it.
I'm still interested by the prospect, however, and have started a little hack-job with SLADE3 to at least identify and extract the lumps. Currently I can extract the content of SHADOW.LIB (both CD and floppy version) and SHADOW2.LIB. Which doesn't mean these lumps' own formats are understood, but that's still a start.
RAVDATA.DAT (along with many other .DAT files, especially