Is it possible to take maps from different games and load them in your own application? I know it is possible with Quake and Unreal Tournament, but what about games like Neverwinter Nights, Giants: Citizen Kabuto... Sacrifice... World of Warcraft? Everquest?
I am specifically looking for instructions or links to tools that will allow me to do this. Existing API's or, even though its not the right topic area, some import/export mods for 3ds max or milkshape that will allow me to then export to some format that, say, the Irrlicht game engine can normally read.