M4L0 is a singleplayer map. I just removed all the buildings/ai, filled in the holes, and added multiplayer spawn points. So, now it can be used for multiplay--hopfully with the addtion of new buildings and models.
to make sure that noone thinks his files will be 'trashed', and to pronounce the effect of their revitalizing, i changed the site's name to MOHAA RECYCLING BIN
hope this'll help