ok i tried again ... this the last thing i tried : this is my answerfile e.g mui.txt [Unattended] OemPreinstall=Yes OemFilesPath=".\Retestrak\MUI" <----is this correct ??? OemSkipEula=YES [RegionalSettings] LanguageGroup=1,2,5,6 Language=0409 i put these 2 lines in WPI %CDROM%\Retestrak\MUI\MUISETUP.exe -i 0406 0413 040b 040c 0407 0410 0816 0419 0c0a 041D 041f -d 0409 -r -s %CDROM%\I386\winnt32.exe /unattend:"%CDROM%\Retestrak\Z\mui.txt" /copysource:"lang" /s:"%CDROM%\Retestrak\MUI\" and i still get the same error as in above post can anybody please please help me i'm starting to pull my hair out here