So the W764A is out. Windows sees the files but says they are no good.
Go back to the file in windows 8 and do a dry run, so that when you are in the W7 installation program you know where to look.
C:\AMD Chipset Driver folder\$_OUTDIR\Packages\Drivers\SBDrv\hseries\AHCI\WB64A (letter B)\ and select the amd.sata setup information file from the list.
Do you see what I am referring to now?