Forum:Texture problem- how?

I need help. I downloaded a mod that has custom made textures and designs. The problem is, they do not show up correctly when I play fallout 3. This happens in all mods that I download that give custom textures (i.e. Enclave Commander, CRI Squad, Various armor mods). When I play the game, the actors that wear the various custom armors are usually translucent, environmentally changing (changes with what they pass over, rocks, cement, flesh, etc), or way too bright (helm rendering, etc). What's the deal with this?

I was told to extract all the files into the data folder, and then im good to go. It has never turned out to work -.- what should I do?