FEM – Full model export.

So, instead of a hammer, the model uses the geometry of a glaive. Is that why the hammer texture is applied to the glaive?

The game uses files with a more "recent" save date. If you want to use it together with the regular version, you need to duplicate all the main data from the xdb files, as is done in ncf, and you can change the last value in the 3D model's name.