Basic Texturing for games - What are all the different files for?

[mholder]

I am guessing, but looks like textures for a 3d model, where tex_al_rifleman.dds is the main diffuse texture. I wouldn't mess with any of the others if you just want to change the color. If your attempts to adjust the texture are too dark or bright, then perhaps the textures need a gamma curve applied or removed.

As rich2005 suggests, you should find a forum that deals directly with modding this game for better advice.