Applying Cube Maps to Character Meshes (.nif)?

[Terratic]

Having some trouble with NifSkope.

 

I'm trying to make a custom character that resembles Colossus/Silver Surfer by messing around with shaders in NifSkope, but Skyrim crashes every time I try to load a character mesh that has environment mapping. I'm using this guide here: https://forums.nexusmods.com/index.php?/topic/1188259-bslightingshaderproperty-basics/

 

Is anyone else able to get it to work? I've been trying for several days. Any help would be much appreciated.