error opening operating system winxp imaging

> we are in the process of imaging dell p3 833mhz machines, created an
image
> (xp) put the image up(the image works fine), brought the image down-all
> looks great-reboot and get the message error opening operating
> system....we believe it is a problem associated with the format of the
> hard drive (zen imaging works on all other machines we are working with)
> these particular machines came to us as surplus and have had the HD
> scrubbed...we are at a loss to get this to work...any ideas??

after the image comes down, try booting to a 98 boot disk & run an
FDISK /MBR to reset the master boot record.

I've seen problems like this before & the boot record was the answer.
I ened up scripting all my image objects to tftp a backedup mbr file &
then use it AFTER the image and BEFORE the first reboot, ala --

(Image Object - Scripted Image Section)
hdparm -d1 /dev/hda;
img rp x.x.x.x //%servername%/share/base.zmg;
img rp x.x.x.x //%servername%/share/addonimage.zmg;
tftp -v -c get x.x.x.x:boot.MBR #(where x.x.x.x = the tftpserver address)
dd if=/boot.MBR of=/dev/hda bs=446 count=1