.x import is poorly supported with modeling programs that I use, including Milkshape and Ultimate Unwrap 3D.
You are right. If I remember correctly, I was losing information when importing my models into MS3d. I can't remember
what data I was losing, but I do remember having problems. I will have to look at some docs on the MS3d format. If it isn't anything too out of the ordinary, then I will consider it.
Another command has been added. You can now set weighting info

MT_SetBoneInfluenceWeight ObjID, Limb, BoneNo, InfluNo, Weight#
I just realized that I didn't add anything to retrieve the verts of polys. I'll probably do that next. I'll also add a command to calculate the normal of a poly