How do I boot to a 500GB USB drive, run Ghost 9 or 2003 and then take an image?

The subject line says it all.


I need to be able to boot to USB (USB2, preferably).  I need to run ghost.exe - I have 9 and 2003.


I need to be able to access many gigs of data (so some of the disk needs to be NTFS, presumably.)  I need to be able to take an image (of XP) from a PC, onto the USB HDD.  I also need to be able to deploy an image (of XP) from the HDD to the PC.


The Ghost Boot Wizard only lets me prepare a floppy drive.


(Separately I've tried running BartPE, but am getting stuck because (I think) group policy is stopping me accessing certain systems files when creating the build disk.)


Any help?


Richard