Thanks, I see the question is answered on your E2B website. I'll get around to converting the ISO soon. I find that imgPTNs are usually more useful because they can boot in either legacy or UEFI, ISOs appear to work only in legacy mode.
I have another quick question: Is it possible to run E2B from within a NTFS GPT partition on an internal drive? I would find it very useful to be able to place my most used booting mediums there so I don't have to constantly use a USB flash drive. I would use this as a sort of onboard recovery partition of sorts.