Help with soulgem textures

[AureumCustos]

Hey so I have an issue and I need some help I have a mod and all it does is change the shape of soul gems to spheres and replace the textures for new ones for each "tier" of soulgem.

I've already replaced the meshes in the mesh/clutter/soulgem file with

• 
  
• soulgemblack01.nif
  
• soulgemcommon01.nif
  
• soulgemgrand01.nif
  
• soulgemgreater01.nif
  
• soulgemlesser01.nif
  
• soulgempetty01.nif
  

However I can't to get the game to read the texture files I put into texture/clutter/soulgem. Any help for an rookie modder?