I beleive the script is more custom to what Blender wants.

"Anthony D'Agostino wrote a custom blender .lwo import script to enable exporting data from MoI to Blender while preserving the accurate vertex normals to get high quality smooth shading, Getting the accurate normals makes a significant difference in increasing render quality, it eliminates small shading glitches that happen when the shading normals are created just from averaging adjacent polygons."

You can read and see why here:

http://moi3d.com/forum/index.php?webtag=MOI&msg=979.1