Anyone want a little help?

[Mudbill]

Replacing another texture would probably make the reference to the original file use your texture again, but whether it would work well I don't know.

I didn't look at the file (because dds files are annoying to preview), but is this just a bump map? Shouldn't you apply it to a diffuse map?

Normally you keep a diffuse map for the texture, a bump map for bumps, normal map for normals and spec map for speculars (sometimes even more), and you apply each individual file to the diffuse material in the material editor.