I have completed my unattended dvd for windows 32-bit and was giving a go to windows 64-bit. I made the same steps but i have trouble with the regional options. In particual, if i choose greek on all options(with n-lite) the greek language is not even installed. Then, when i test my dvd office says the language i am trying to install is not supported by the OS and doesnt install :/. Two things: 1) By comparing the two WINNT.SIF between the 32-bit DVD and the 64-bit one, they are identical(except the cd-key of course...). THe 32-bit version works great 2) When i install the 64-bit version unattended without regional specification or normally(non-unattended) the greek language is installed, although obviously not preselected. The WINNT.SIF is this: ; Generated by nLite 1.4.1 [Data] AutomaticUpdates="Yes" Autopartition=0 MsDosInitiated=0 UnattendedInstall="Yes" [Unattended] UnattendMode=FullUnattended UnattendSwitch="Yes" OemPreinstall="Yes" OemSkipEula="Yes" FileSystem=* WaitForReboot="No" NoWaitAfterTextMode=1 NoWaitAfterGUIMode=1 DriverSigningPolicy=Ignore NonDriverSigningPolicy=Ignore [SystemRestore] DisableSR=1 CreateFirstRunRp=0 [GuiUnattended] AdminPassword=* TimeZone=130 OEMSkipRegional=1 OemSkipWelcome=1 [Shell] CustomDefaultThemeFile="%WinDir%\Resources\Themes\My Theme (nL).theme" DefaultStartPanelOff="Yes" [Components] [UserData] ProductKey="xxxxxxxxx" ComputerName=UWI FullName="UWI" OrgName="-" [RegionalSettings] LanguageGroup=4 Language= "0408" [Networking] InstallDefaultComponents="Yes" [WindowsFirewall] Profiles=WindowsFirewall.TurnOffFirewall [WindowsFirewall.TurnOffFirewall] Mode=0 [Identification] JoinWorkgroup="WORKGROUP"