While testing all the .wim files in Medicat 21.12, I found that the Lockpick.wim file would not Legacy-boot from the Easy2Boot menu system.
All the other .wim files seem to Legacy-boot OK (except for the DiskGenius.wim file which seems to load and briefly display the WinPE Desktop and then immediately reboot on E2B, agFM and Ventoy???).
Easy2Boot 2.15 and previous versions booted a .wim file by using a default boot.sdi and bootmgr file and it creates a BCD dynamically with the name of the boot file in it. For some reason it seems to crash however on the Lockpick.wim file.
So Easy2Boot v2.16a Beta now supports the .wimboot file extension and this will load the wim file using the wimboot method (derived from the iPXE github project and used by agFM and Ventoy).
Download E2B v2.16a from the 'Latest Betas' folder - https://easy2boot.xyz/download/alternate-download-sites/
QRUN will suggest that you try .wimboot instead of .wim, or you can just give the .wim file a _.wimboot.wim file extension and it will automatically use the wimboot method without prompting you.
e.g.
