Okay, so anyone who has ever toyed with models to any moderate extent knows that they can't do anything with the longsword models, Thunder's sword, and a few other things. I know why, and I have tested and proved this theory.
It's the name of the submesh. It's so damned crazy that such a little thing has had people stumped for so long.
Anything with the terms
word,
dword, or
sword will appear to be borked. This is because these terms are used in data interpretation, so it misinterprets the label and breaks!
The fix is easy too. In FE, before exporting the model, switch over to the appropriate tab, click the appropriate submesh that is labeled as sword, and change the name! Apply changes,
then export.
This happens to more than swords because LH devs have found it worthwhile to mislabel submeshes in other models in the graphics.big. The crossbow bolts, for example, are labeled as "mouth" if I remember correctly. So when a model fails to load in something, check the submesh names for any technical terms that might be screwing up the program you're using.
Working longsword model in DirectX Model Viewer:
So, it wasn't a good job at all, just trying to right those earlier wrongs, which is why I posted this on both forums. 
