Skyrim weapon retexture glitch

[Enderverse]

Hi. Sorry if this has been solved before, but I have no idea how to search for a topic on this.

Anyways I just began using nifskope and managed to only figure out not even the basics. In Skyrim, I extracted a nif of a sword and added a new texture from Gimp. Everything looks fine and when I load it and preview in the Creation Kit, the weapon looks just like I wanted it to. However, when I actually play the game, the weapon is extremely dark and has brightly colored pixels and stripes randomly generated all over it. When I attack with it (and get blood on the sword) parts of it turn neon purple. I have no idea what's going on and have spent several days trying to fix/figure it out. I don't know why, but I'm suspecting it has to do with the shader flags in the BSLightingShaderPropertys. Maybe I have the wrong ones?

They are

Shader Flags 1: SLSF1_Specular|SLSF1_Environment_Mapping|SLSF1_Recieve_Shadows|SLSF1_Cast_Shadows|SLSF1_Own_Emit|SLSF1_Remappable_Textures|SLSF1_ZBuffer_Test

 

and

 

Shader Flags 2: SLSF2_ZBuffer_Write|SLSF2_Double_Sided|SLSF2_Vertex_Colors|SLSF2_EnvMap_Light_Fade

 

Are these shaders okay for Skyrim? Is there even a problem with shaders here? Since it looks fine in the Creation Kit, but not Skryrim, is the problem with either of these two?

 

The texture is a .dds, uses BC1/DXT1 compression, and mipmaps were generated.

 

Anyways, here it is in nifskope:

http://img268.imageshack.us/img268/525/nifsinge.png

 

How it looks in Creation Kit:

http://img209.imageshack.us/img209/2292/creationkit.png

 

But how it actually looks ingame:

http://img521.imageshack.us/img521/8966/singeglitch.png

 

Here are the actual nif files

 

1stperson:

http://www.mediafire.com/?t4kpuqk2bwzpm9v

and

World:

http://www.mediafire.com/?wr1reyrkrekmbrm

 

Just recently, when previewing the model in the Creation Kit I get this:

Assert

Assert File: C:\_Skyrim\Code\TESV\BSShader\Shaders\BSLightingShaderProperty.cpp

 

Line: 806

 

I've been wracking my brain on this for days and help would be much appreciated, thanks!