First thing, I believe that for this to work, the file names all have to match my worldspace copy's name, which by necessity cannot be what the old one was, which was "Wasteland". If they don't have to match, it's the way bethesda did it so I have been assuming that this has to be the case (had looked at how the DLCs were packed).
I was able to do a mass rename on the files. With the files simply renamed to match my worldspace, and those paths correct in my .bsa (which I feel sure they are), they do not display in game. I think I see why...
See here:
http://www.finhosting.fi/~fallout/screenshots/NifskopeImage.gif
This is an example.nif file opened up in Nifskope. See at the bottom of the window where the texture paths are pointing to 'wasteland' instead of the correct worldspace name, which is 'hummerwasteland'.
It looks like to do this, in this way, I have to cause several thousand .nif files to carry this new, correct path to their hummerwasteland textures.
I get the sense that I must at least have that directory path in the .nif correct. If anything, maybe it would work to fudge on the texture name if I had to, naming that back to plain old wasteland instead of hummerwasteland. But I know that path with Wasteland in the directory name must be changed.
I know exactly how to do it by hand. I have had to fix the paths in Lord Inquisitor's Hummer mesh itself enough times. But um ... Yeah, this one ain't happening by hand. I'll guess its over 3000 nifs.
Does anyone know if there's any automated means to do this mass path adjustment in all these .nifs? or, maybe there's some shortcut to where I don't have to?
* kinda doesn't wanna try that LOD mesh generation thing in GECK*