WDS + Asus PN62-B

Step 1: ASUS -> Powershell as admin: Export-WindowsDriver -Online -Destination C:\drivers (Windows should be installed with network drivers working)
Locate the NiC driver (ASUS PN62 – e1d68x64.inf), copy all the dir aside (.cat .sys .dll)
Step 2: On other machine copy Boot.wim to c:\tmp\ , copy drivers from (1) to c:\tmp\drivers, mkdir c:\tmp\BootWIM
Step 3: run these commands on CMD Elevated:

DISM /Mount-Wim /WimFile:c:\tmp\boot.wim /Index:2 /MountDir:c:\tmp\BootWIM
DISM /Image:c:\tmp\BootWIM /Add-Driver /Driver:c:\tmp\Drivers /recurse
DISM /Unmount-Wim /MountDir:c:\programdata\dism\BootWIM /Commit

Step 4: Copy the new Boot.wim back to WDS and import the boot file to Boot Images.