PXE boot an iso image

[Brian Platt]

I have a custom debian iso image which i'd like to be able to boot from using 
pxe. I've setup a pxe server on a debian machine using this guide 
http://wellsie.net/p/286/
and now end up with 'dnsmasq-tftp[2397]: sent /srv/tftp/pxelinux.cfg/default to 
192.168.15.119'
but the client then hangs. I've messaged the author but no reply and not sure 
of the next step to troubleshoot this issue.