Originally Posted by XDelusion
Put all three WAD files in the same directory as your BOOM executable.
Right click on the BOOM icon, and add in the WAD files through there.
Scroll down and you'll see what you need to do.
P.S. I forgot to include the separate BEX file for BOOM. Rather I injected it into the AB3D.WAD file as that's how PRBOOM Plus handles them. I'll upload the BEX shortly.
Sorry = I right click on glboom or prboom and I can't see an option to add wad, If I use the menu I do get AB3D screen and some changed baddies but map is still doom1.