(Found this discussion via a google search for c_20127.nls) Unfortunately this NLS error continues to occur, with all the latest XP SP3, Sysprep, and nLite software. It seems that for the latest and greatest hardware that lacks a floppy drive, it is next to impossible to install a SATA hard drive controller driver via the normal Windows XP setup process, and therefore next to impossible to install XP in place of Vista. XP text-setup cannot recognize USB flash drives as a source of drivers, nor can it recognize USB keyboards which are not being managed by the BIOS, since the XP text-setup is not a full-fledged plug 'n play hardware environment. XP text-setup also doesn't seem to like USB floppy drives either if the system BIOS isn't handling the device. Short of hanging a floppy drive out the side of the computer in question there is virtually no way to install XP on a newer computer without driver support for the SATA storage device included within the XP boot image. , nLite appears to be the only option available in this situation, since only nLite offers the capability to preinstall textsetup device drivers into a custom, bootable Windows XP image. Microsoft apparently does not want anything to do with XP anymore so there will be no changes to XP text-setup, for storage driver installations from devices other than the nonexistent drive a: in newer computers. , If anyone can suggest an alternate Microsoft-approved driver-preinstall option for XP I would love to try it. The most logical option is to build a sysprep image on another computer, and somehow preinstall the text-mode driver into that image before applying it to the new computer. But it does not appear possible to preinstall a text-setup driver for hardware which does not exist in the source computer that is providing the sysprep image for the target machine. Note that trying to install a storage driver via Sysprep \i386\$OEM$ does NOT work because the image fails to even start up, due to a catch-22 lack of storage drivers when the sysprepped image kicks off on the new hardware. It never even gets to the point of running sysprep text-setup without a STOP 7B - inaccessible boot device. - Dale Mahalko