Atheros

ensure that the driver inf that you are using contains the hardware id and is of the correct architecture for the winpe that your using. if you installed the WMIC package into your winpe you can get the VEN and DEV from the "WMIC NIC" command within PE. also veryify your winpe startup actually enables networking: manual command: "wpeutil initializenetwork"

if i ever have problems with drivers, i just rebuild the image completely with the new drivers set. injecting 1.2GB of drivers then trying to reverse engineer the problem has always failed for me even upon driver removal (**** you 20 versions of intel HECI!!!!) (ok the censorship is way OTT, it makes it look worse than what i actually said!)

as trip said, Networking driver should be injected into the image. however if your not in a DHCP enviorment (i do tests with a winpe with a mounted ISO on a VM). in this instance i need to set a static address by firstly getting the adaptor name using ipconfig then by using the folowing command netsh interface ipv4 add address "Wired Ethernet Connection" 192.168.x.x 255.255.255.0 ?where "Wired Ethernet Connection" is the name of your adaptor you may or may not have to put the work "static" between the adaptor name and the network address depending on what PE you are using.