You need to add these lines to WINNT.SIF in I386 folder- [shell] CustomDefaultThemeFile="%WinDir%\Resources\Themes\ThemeName.Theme" Then add these folders to $OEM$/$$/ Resources(Copy and paste your Themes folder) here. Any non-default cursors,wallpapers,sounds,etc will have to be copy and pasted at same location into following folders Cursors Fonts Media(for Sounds) System32(for ScreenSavers) Web/Wallpapers Hope this helps