Error: Non-standard-file Not Processed - Naffatun

[Bones4491]

When attempting to edit Naffatun mesh files using the GOM toolkit I run into this error.

I have been editing SS files so far, but I could not find a Naffatun mesh within the mod itself so I tried looking for it in base MW2. While I found said meshes I cannot convert them.

Is there something additional I need to do here? I am able to edit other meshes within the base MW2 folder, just not Naffatun specifically.

EDIT:

So apparently GOM does not seem to work on default MW2 meshes, and you need to use tools such as M2TWMT to convert them. Sadly Milkshape3D won't let me save these files on the trial, but will for GOM. Very weird!

EDIT:

Oh nvm you have to open Milkshape3D program first before simply opening a file with it. Works fine this way.