@mhx Ok then lets extend a bit on what Sebastian suggested. Right now the main issue is PXE booting into FOG, and your firmware’s absence of a uefi network stack. So what we are going to attempt is to supplement your firmware by booting the iPXE boot loader directly from a uefi bootable memory stick using this process: https://forums.fogproject.org/topic/6350/usb-boot-uefi-client-into-fog-menu-easy-way
typically the PXE rom in your network adapter reaches out via bootp and downloads the iPXE boot loader from the network, in this case we are going to load it directly from the USB flash drive. That flash drive can be tiny in todays standards. The iPXE boot loader can easily fit on a 512MB flash device. There is no need for anything bigger since it will be just a waste of empty space.