This is my way of seing the map 8 of the first episode of Ultimate doom, phobos anomaly. This level, like you've guessed, replaces the e1m8 of ultimate doom and features monsters from the realm667 site, textures from various sources(some from kdizd,zpack and alot from the nb5d1.wad), scripting, etc...
-Nick Baker for textures from nb5d1.wad -The creators of zpack(for the textures I've taken) -The creators of the new monsters(the ones from the realm667 website) -Codeimp for doombuilder 1 and 2 -The author of XWE, audacity and all the other authors I might of forgotten ;)
1 year(from june 2009 to june 2010)
Doom builder 2, XWE, Audacity
Didn't find any but feel free to tell me if there are some.