pxe boot an iso

ok so i have an iso image of winpe with ghost – boots directly to ghost window. i would like to be able to boot this iso via pxe as ghosting is a lot faster (2.5GBmin opposed to the 500MBmin). i have ghostcast server installed on a server 08 r2 machine. basically i would like to know how to creater the pxe sys file to boot the iso so then i can join it to the ghost session.