Here it is in short....
You need 3ds max 7 with word lta plugins
Open a Obj of a map, export as lta, open in Dedit, ???, profit?
Your outcome, when u texture and all that....
http://www.mpgh.net/forum/211-combat-arms-mod-discussion/258910-new-map-mini-hell-v1-0-please-answer-poll.html