there is a editor made by Discreet.
they make 3d studio plus, and Gmax (3dmodel programs)
but they do make a editor for moh/aa
http://www.discreet.com/index-nf.html
but i really recommend using mohradiant.
if you cant get radiant to work.
then your not going to get this to work.
I only say that because Radiant has to be the easiest editor i have ever used.