He modified KB5073032 to accept installation on 26100.1 keep this "hacking" stuff in the correct thread [GUIDE] [DISCUSSION] Windows Editions Reconstructions
I see when you said "(DISM Offline Only)" i thought it's modified but that's still preprelease, and signed with dev certificate i don't think there are hidden features yet, so it only change registry display version to 26H2
You should check the uup-converter-wimlib-125 version you provided, why did you allow 26200.8973 to accept the KB5073032.cab file. https://forums.mydigitallife.net/threads/windows-10-esd-repository.59082/page-61#post-1303176
It does not "allow" it, it's dism / cbs that does similar to how 25H2 EKB can be applied to LTSC 2024 and Server 2025
Concerning UUP Converter. How do the "wim2esd = 1" and "vwim2esd = 1" options in ConvertConfig.ini fit into the script, logically? When you start it standalone, you will get an explicit choice to create install.wim or install.esd (or ISOs containing them). This choice MUST absolutely override anything set in the ini. Yet, when I select to create a WIM in the menus, it will still create an ESD nonetheless (and lists the wim2esd option at the start). So either one or both of these options from the ini seems to have a too high priority.