iPXE.EFI chainloading an ISO File

[BenXvisual]

Hello - I have been struggling for around 2 weeks now with getting an ISO (arch Linux image) to load via PXE.

My setup is WDS running on WS2016 I have configured the DHCP to hand out the iPXE.efi file and a boot.ipxe file to give me access to a menu system. I am also using Wimboot which loads a PE environment using a WIM file.


The issue comes when trying to chainload an ISO image. while it works perfectly in legacy mode with the unidonly.kxpe it refuses to work with EFI. I have also tried to load the individual efi and img files which are inside the ISO image however I can only get it to boot so far before it fails. these ISO's are also changing on every new version (Blancco) so ideally I could do with loading it from the ISO for quicker replacement.
Any help greatly appreciated.

Cheers
Ben