OK, I figured out the problem.  In the sysprep inf I was using the syntax: OemPnPDriversPath = "dell/drivers;%systemroot%\inf", which I read should work, but it never did.  So I back-tracked, removed that entry, and basically hardcoded it into the device path string with: c:\Dell\drivers;%systemroot%\inf, and all is good.  All models are finding the drivers in the appropriate drivers folder from these locations.  Iceman Thanks for your responses!  So basically I have a 260 successfully imaged to work on 270, 280, 320, 520, 330 (in progress) and a D600 working on 610, 620,630.  Yayuh!