Summary:

I've updated my WDS install point with the Windows 7 RTM WinPE image and injected drivers for my machines.

Details:

I keep a directory of extracted WDS x86 drivers for all machines I have to support.  I'll keep adding drivers to this driver folder, then injecting them into a clean boot.wim file each time.  This allows me to rollback a failed injection.

1. I downloaded the WAIK for Windows 7 RTM
   The Windows® Automated Installation Kit (AIK) for Windows® 7
   File Name: KB3AIK_EN.iso
   Version: 1.0
   Date Published: 8/6/2009
   http://www.microsoft.com/downloads/details.aspx?familyid=696DD665-9F76-4177-A811-39C26D3B3B34&displaylang=en
2. Next, I copied the latest boot.wim from a Windows 7 RTM image, copied it into f:\temp
3. From an elevated command prompt with the WAIK in the PATH, I run:
   dism /mount-wim /wimfile:boot.wim /index:2 /mountdir:f:\temp\mount
   Note: index 2 is the Setup, index 1 is WinPE.
4. Then
   dism /image:f:\temp\mount /add-driver /driver:F:\Driversx86R4 /recurse
5. And finally:
   dism /unmount-wim /mountdir:f:\temp\mount /commit

The resultant WIM can then be added to WDS for deployment.