Textures: SizedString:: textures\AnyAdditionalFolder\diffusemap.dds
Textures: SizedString:: textures\AnyAdditionalFolder\normalmap_n.dds
and so forth..
Well now..the correct way doesn't work for you.
Edit: Oh wait, it's not supposed to show up. That's normal. It WOULD show up if you used the entire root path, but only in nifskope.
The game only needs to read from "textures\etc". The path going to your root will result in the textures not showing up in game.
Just to add to what Terra Nova said, Nifskope cannot read from .bsa's. So unless you have all your textures unpacked into your Data folder (NOT recommended), no, you won't see them.
I actually have textures unpacked in another directory on my hard drive, and point Nifskope to that. Or, you could unpack only that FarmhouseLOD texture you want, place it in the Data folder (in the correct file path) temporarily if you want to see it.
One other thing to try is change the /'s to \'s in the paths (ie. C:\Program Files(X86)\ not C:/Program Files(X86)/ ) --- IIRC the wrong direction of the \ in the path can cause problems with the folder being found properly.