I need to know how to install textures and meshes because i put them into the data files and ticked the esp box but now when i go into the vault that i downloaded half of the stuff has an exclamation mark with a red diamond behind it. PLZ HELP?!

Did you use the "archive invalidate" thing?


http://www.fallout3nexus.com/downloads/file.php?id=944

Install all the folders and subfolders as well + make sure you have archive invalidation invalidated. Alternatively many mods can be installed using FOMM's package manager which makes installation much easier.

EDIT: FOMM has archive invalidation invalidated incorporated into it, there is no need to dl it from the nexus.