put your file(s) into i386 and add line(s) under [sourceDisksFiles] like this [sourceDisksFiles] myfile.ext = 1,,,,,,,45,0,0 The number 45 means %systemroot%\Temp (see section [WinntDirectories]) If you dont want your files have to be in i386 but another folder just define a source ID in [sourceDisksNames.x86] section see also http://www.msfn.org/board/index.php?showtopic=14852