Subwad.exe.. Another utility from Geoff Phillips. Written in two hours
on a cold April day in 1997.

Version 1.0:...
This program subtracts texture entries in one file from those in another, or
to put it another way, those textures that exist in the second file are those
that are deleted in the first.

The command line is SUBWAD wadfile otherwadfile newwadfile

If wadfile and otherwadfile are the same file, you'll end up with a resultant 
12 byte file!

Example: file 1 contains TEXT01 TEXT02 and WALL_03.   File 2 contains WALL_01 
and TEXT02.  Resultant file: TEXT01 and WALL_03.

Geoff Phillips, alias binky@DeathsDoor.com.