The drivers you want are the ones on the recovery partition, the ones that are in the above mentioned folders are already installed. I don't have a SP but there may be a drivers folder in the root of C:\ Have you plugged the USB Drive that you copied the recovery partition to see if you can browse the directories? If you were Deploying Pro you could use the OEM WIM file (you VL would upgrade the OEM licenses), but because you are Deploying Enterprise then yes create a clean Gold Image.