Logon image is random, desktop bg and theme can be set with WINNT.SIF [Shell] CustomDefaultThemeFile="%ResourceDir%\Themes\<Theme_Name>.theme" If you want to open (cant apply) a .theme and/or .msstyle file with your "installer" you could try one of these commands rundll32 Shell32.dll,Control_RunDLL desk.cpl desk,@Themes /Action:OpenTheme /File:"%WinDir%\resources\themes\windows classic.theme" rundll32 Shell32.dll,Control_RunDLL desk.cpl desk,@Appearance /Action:OpenMSTheme /File:"%WinDir%\resources\themes\folder\file.msstyle" There might be a command to simply apply the theme but I dont know it