There is a new version of DM_Fallen2 available for download. The new version was tweaked by gellehsak, and features such changes as:
2 rls, 1 lg, 1 sg, 1 ga, 1 sa, 1 mega, 6 25 health, 2 small lg packs, 1 large rl pack, 1 small rl pack, 1 freezer ammo pack, 3 cg ammo packs, 3 shiruken ammo packs, 3 shotgun ammo packs, 3 stake gun packs, mega moved to the center platform in the old-ga room, mega from center “pillar” in lava is now a 25h bubble, lg has 30 ammo on pickup, and the ammo packs have 15 each.
You can download the map here.
Extract the DM_Fallen2te.pkm to Painkiller/Data.