open up the *.qhm files in notepad or DOS edit they'll make sense
when you look at them.

These files are the building blocks of the level using multipass
files 

file ending in     contents if file
==============     ======================================================
     01            Main map, doors, walls, floor, ceiling and things that cut in

     02            Room features, ramps, walkways, lights.
  
     03		   items at floor level

     04		   items on walkways, blocks, crates and altars