I coverted half of Ultimate Doom to MAPS.  It's quite easy once you get
the command right.
WAD2MAP C:\DOOM\DOOM.WAD e1m1 DUKE.TXT
Of course the path may be different on your system, but you want to make
sure that the DUKE.TXT is in the same directory you are in.
Also, if you want to convert DOOM2 WADs, instead of typing in e1m1(or
what ever episode and level you want to convert), you must type in
map01(map12, map23, map31, etc.).
example:  WAD2MAP C:\DOOM\DOOM.WAD map01 DUKE.TXT
The converted WADs look alright, alot of the doors and such are not
converted perfectly and therefore won't work, but they would be great
for deathmatches.
I hope this helped.
Later...
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