USB auto install ghost with shutdown

I am using Ghost Solution Suite 2.5 to make an USB bootable flash drive that will automatically install a .gho image on a remote computer.  These are POS computers running windows XP, and need the HD reimaged on site after failure.  I have the USB booting to WinPE (after choosing USB boot in BIOS) and auto installing the image.  After that, I have it exiting to Winpe cmd prompt.  Is there a switch that will shutdown the computer so I can then have the user unplug the usb and reboot?  I tried -rb, but it keeps rebooting back into winpe and reimaging.  The switches I am using in the USB boot wizard are (start ghost.exe -clone,mode=load,srcd=D:\image.gho,dst=1 -sure -FX).  Thanks in advance for any ideas.