I need some help with this, in order to get ripples to appear on the water I've placed the water noise texture needs filling in. It's in vanilla cells, like for example Broc Flower Cave's water noise texture is "Data\Textures\Water\wastelandwaterpotomac.dds" which I assume is in the bsa files.

Now when I click on the water noise texture button it only points me to my data folder where you usually place mods, I need it point to the bsa file (I assume) which will contain all the art files and such. How do you do that? Thanks.

You need to use a utility like FOMM to extract the texture file from the BSA archive. Then you need to put it in the same folder tree and direct it to THAT, not the BSA.