In my unatended win2k installation I have some problems with 56.64 . It locks the install if I install them as drivers . So ... pui in your .cmd file %systemdrive%\drivers\detonator56.64\setup.exe -b -s But for this to work in your setup.ins file you must change bootoption from 3 to 0 bootoption=0 My drivers are from nvidia.com and they are signed OR in your winnt.sif OEMPreInstall=YES OemPnPDriversPath="Drivers\detonator56.64" DriverSigningPolicy=Ignore