Actually there is. I looked at my WAIK install and it had dism so download
WAIK (Windows Automated Installation Kit).
There's also
Microsoft Deployment Toolkit (MDT) 2010 Beta. I was playing around with it earlier and didn't have much success and wasn't in the mood to read the help files.
Probably the easiest method would be to try
vLite but I don't know what success people have had integrating drivers. vLite was designed for Vista but it does work with Windows 7. Check over at
msfn.org for vlite issues.
The last 2 options still require you to have WAIK installed!