Mods dont work on my version of Fall Out either apparently, I download them, install them as I do in Oblivion, go into Data Files, check them off, click OK and ... doesn't work?
Same.
You will see that when you go into Data Files again it will be unchecked, even though you have checked it off. Its getting on my nerves really, I will study for a solution though.
EDIT:
Well that was fast, I downloaded and installed FOMM (Fall Out Mod Manager) its much better than the data files way of doing it. And the mods worked fine for me after this.
LINK

Eidos!