Final Doom "Message To The Archvile" MIDI?

What Is The MIDI Name For "Message For The Archvile"?
Is It "D_MESSAGE"?

Please Help.

You didn't even mention the particular IWAD (you probably mean TNT, but I'm not sure). Anyway, remember that you have doomwiki:

http://doomwiki.org/wiki/Final_Doom_TNT_music

http://doomwiki.org/wiki/Final_Doom_Plutonia_music

http://doomwiki.org/wiki/Doom_2_music

EDIT: Or you were just looking for the list of MAPxx music lump names? In that case, see the Doom 2 music list linked above, or open your IWAD in SLADE3 and see/hear for yourself. MAP20's music name should be "D_MESSAG", without the E at the end, because lump names can be 8 characters long at maximum.