Hey, while we're talking about Doom2 and mapmaking in Doom2, then I simply to make some propaganda for my maps :D
Here's some links that you may find interesting
Alien Vendetta
http://www.doom2.net/~av/
My maps in Alien Vendetta are map 03 and 04. Some of the ppl who made maps for that project are doom speedrunners too.
Hell Revealed2:
http://www.doomworld.com/hr2/
Hell Revealed 2 is a tribute to Hell revealed (surprise), which was made by the famous Quake speedrunner Yonathan Donner, and some guy. My maps in Hell Revealed 2 are: 20, 23 & 31
Although it says map 20 & 23 belongs to someone else, well, I guess they screwed up. I can't actually prove it, but I have no reason to lie really. The project was kinda messy and it was more or less abondoned many times and then they got back to it... so I suppose it kinda got messed up somehow.
And a free standing map is Legacy.
http://www.bktv.se/~a3087a/legacy.zip
It uses the textures from the Alien Vendetta project, so you gotta have it in order to play this map.
And I also got a shitload of other crappy maps if someone is interested :D
I made my maps with an editor called DETH btw. It was pretty similar to DEU. This was back in 1999-2000. Before that I used DEU, but I had problems with it, it ran out of memory and created strange bugs, so called Hall of mirrors, so all my maps before I got DETH back in 1998 really sucked and was full of bugs.
That's all folks.