Note E2B v2 can now directly Secure UEFI-boot from ISO files – no need for .imgPTN files!
Boot from 100’s of different UEFI payloads (even Secure Boot).
You can add multiple Linux, Windows, KonBoot, various WinPEs such as Bob Omb’s/DLC/Strelec, MemTest86, etc.
Demo of a UEFI multiboot E2B drive which can be used on UEFI-only systems. The second part of the video describes how to make the UEFI E2B drive by adding a second FAT32 Primary partition.
See for how to make UEFI .imgPTN files