This is actually really easy, assuming you have Vista drivers for your hardware. You can use this for any driver (disk controllers, NICs, etc)
1) Download the device driver and put in somewhere convenient on a machine with WAIK installed.
2) Mount the .wim you want to add it to using Imagex.
imagex /mountrw [image location] 1 c:\winpe_x86\mount\
3) Add the .inf using peimg.
peimg /inf=[path to driver .inf file] c:\winpe_x86\mount\Windows
4) Unmount and commit the image back to the .wim.
imagex /unmount /commit c:\winpe_x86\mount
5) Add the image to the WDS console, or replace an existing image.
That’s it! You’re ready to go!
Posted by Matt 