its possible to export & convert the models as .MDL format. (you can download it for free)
..
and to save the level as .map .. i think MAYA23DGS is the only PipeLine Plugin.

normaly i am using .X File Exporter and then import it into MED / 3D World Studio Software.. and Do Some LightMapping ;-).. then import to WED. (3D World Studio Also Not Fully Support WED's Map Format)

its easy if you import into MED. as .X / .OBJ

or use any convertors that can convert .mb file to .map ;-)

Thanks !