Great question! 
Microstudio 4.005 has a Tools menu "Define Field Order..." command and dialog that allows you to select the order the fields will appear in the filename when importing tracks.
I've submitted this to Engineering for review. If it will work when converting KMA files, we'll add it into Songverter 1.003 that we are now working on.
I'll post back here what the answer is when I get it.