One explanation may be me being silly and misreading the file path. I went ahead and browsed to $_OUTDIR\Packages\Drivers\SBDrv\SB7xx\AHCI\W764A\amd.sata.inf and actually got some results. 4 options popped up, and I checked the box to filter it so only the ones compatible with my computer showed up. One result remained out of the 4, so I clicked it and hit next. It started loading for a minute, and then, it gave me this:
http://i.imgur.com/w3nFdnA.jpg
Relating back to the other file path, the one with the WB in it, I could not find that folder at the path you gave me. Maybe I downloaded the wrong file?
What happens now?