Where do I find the water folder, so I can assign noise to my water in my worldspace? I tried looking in data/textures and there is no closer for water. It looks to be all folders for mods. And I'm sure I didn't delete it, because all the vanila worldspaces have assigned water noise.

Unless you've extracted your BSA archives to your Data folder you won't find it. Within FOMM (under Tools) you'll find a BSA Unpacker. From in there just navigate to your Data folder and open, most likely Fallout - Sound.bsa
The BSA Unpacker has http://img149.imageshack.us/img149/6376/47651411.jpg to make finding files much easier.
In there on the left you can select a folder and extract it, or individual file on the right, either to your desktop or your custom folder. I think by default, when you select multiple files it goes to put them straight into your Data folder.

Hope that makes some sort of sense