I confesss...when I did maps (at 2000) the unique option is use the MOHRadint (is a relationship of love and hate).
Now a days I know we have others editors (like GTK Radiant), but the version 1.6.6 (currently) not support MOH:AA

Is there a version that support and do you know maps made using GTK (I guess is the same workflow of MOHRadiant)