are you using sysprep ? or are you deleting the drivers folders ?
Not using sysprep, using Driveforge, not deleting the drivers folder, either. Source is USB or CD, destination is folder at root of local system drive. Today I found that by modifying the registry back to the %systemroot%\INF folder, then restarting, then rediscovering hardware after removing the yellow exclamation points, it discovered them correctly. I don't know why, it seems like DriveForge maybe installed drivers for the monitor that didn't work correctly, then the default INF just made it a plug and play monitor, maybe, and that was better or something. Also, IDK why driverforge leaving the default driver folder to the uncompressed drivers means that it can't recognize things as simple as a USB key w/o changing it back to the INF folder.
Anyway, I can't really give the computer back to a client w/o switching the registry back to the INF folder, so that'll be cool when that tweak is done, IMO.