Yes, you can: look into the tslpatchdata folder.
Allthough, if you have other mods that altered the looks of certain characters or armors, you'll need to edit the 2DA files found in your own Override folder yourself.
If you don't have any such much mods, and say, just basic reskins; you can copy the 2DA files from this mod as well. But DO make a back-up just in case.
What you need to copy, make sure you see file extensions in your folder, to get just the items:
- i_mask_226.Mdl and Mdx
- i_mask_227.Mdl and Mdx
- i_mask_233.Mdl... etc
Then all the skins/ textures:
- J7_mask.tga
- ii_mask_227.tga... etc
All the .tga and .txi files.
Next all the .uti files:
- q_mask226.uti
- q_darthdark.uti
- q_praethelm.uti... etc
I didn't list all the files, but you get the idea
That should be all, you can then just use the chea code: giveitem q_darthdark or use KSE to get them into your inventory.