Start OBMM.
Click Utilities.
Select Archive invalidation.
Click Directly Edit BSAs.
Check Textures.
Check Generate archiveinvalidation entries on hash collision.
Click the checkbox for autoupdate on exit and/or click Update Now.
Close the Archive invalidation popup (click the red X in the upper-left corner).
Quit OBMM or click Launch Oblivion.
It's been written with OBMM 0.7.11 in mind though. I'm using 1.1.12 and can't seem to find anywhere to "Directly Edit BSAs". Everything else I could do fine, but I've loaded it up and it's not working. I presumme it's because of that. Any help would be appreciated. I need this, and to install Francesco's levelling mod and then I'm set for my adventures in Cyrodil!