I was wondering if it was possible, and it was. And now I'd feel bad if I didn't release.
This mod removes the underwear. You will look like a barbie doll (no nipples or other parts). I have no desire to make textures for this, so someone else will have to edit them if they want that (edit the textures included in this mod, not the originals, as I had some issues using the original textures).
Took the femalebodyastrid_0 and femalebodyastrid_1 models (which have no underwear) and used them to replace the original meshes.
Hex-edited the files to point to new textures for editing purposes.