kennygodness

Hello every one, I'm encountering a problem when i try to boot the XP from my USB Harddisk I want to know can i boot a XP from a USB harddisk? I already installed a XP in the harddisk by a desktop, now i used a USB harddisk case to store it and want to boot from it if anybody know what method or software can help me pls do me a favor~ thank you very much!!