not sure if this helps...
try deleting any .PNF files in the i386 dir that have the same file name as the network drivers you are adding. I've heard these get in the way when they really need to be regenerated during the next network install of the image
also stop and start whatever service runs wds. in RIS is was binlsvc.
correct me if i am wrong but i believe the riprep image should utilize all the oem drivers from the flat image. It is my understanding that the riprep still calls on the original flat image in some regards.
hope this helps. i'm sysbuildr on twitter.
