iPXE source code - embedding.elf

[Abrams]

Hello guys,

I have created my own test.ipxe file that I have embedded into the original undionly.kpxe file.

My code inside the test.ipxe is like:

:pc_boot

set initiator-iqn "iqn-details"
sanboot iscsi:"iscsi-details"
boot

My system is booting through an iSCSI disk.
I would like to add/ implement my own .elf executable file before booting through the iscsi OS.
Does anyone knows how I can do this?
For example, I have the file mytest.elf and I tried to following code with no success.

boot mytest.elf
set initiator-iqn "iqn-details"
sanboot iscsi:"iscsi-details"
boot

P.S. My TFTP default directory contains the mytest.elf file but I do not know If I need to import any option of that into my DHCP configuration.

Any thoughts?

Many thanks