how do i boot the iso file using iPXE? for ex i want to boot to hiren.iso

[knatesan]

Thanks for the response.. My actual Intention is to boot to Custom .iso which has my tools running as a startup script..
To create a custom.iso i followed below steps:
1. Installed Ubuntu12.04 and installed my other package.
2. Installed relinux
# relinux iso
3. Created a custom.iso
4. Mounted iso file to temp mount point.
$ mount -o loop -t iso9660 <ISO Filename>.iso /<temp mount point>/
5. cp -R <temp mount point dir> <sandbox path>
6. mv isolinux (dir) syslinux (dir)
7. mv isolinux.bin -> syslinux.bin (in isolinux/syslinux directory)
8. mv isolinux.cfg -> syslinux.cfg (in isolinux/syslinux directory)
# Recreate teh iso file using below command:
"mkisofs -q -V <VolumeLabel> -b <location of syslinux.bin file> -c <boot.cat file> -no-emul-boot -boot-load-size 4 -boot-info-table -R -J -T -o <Resulting ISO filename> . "

Now if i place this resulting Iso in the HTTP path and iPXE boot this recustom.iso, it always goes to hang state.
it hangs in the below state:
"[/i][/color][/b]Booting from sandevice 0x80"

Am i missing any steps? or committing mistake?
i am struck on this for a while.. any help would be highly appreciated..

Thanks again .. looking forward to have a solution.