I'm currently running Bookwormpup64 under Ventoy on my Secure Boot system. It works great, but I do wish it would boot natively so I don't have to jump though hoops.
Here is the main hoop: Every time I want to start it, I have to press "e" on the first entry and add "psave=sdd6", then press F10. This is a PITA. I just know I could edit that line in the ISO using an ISO editor/rebuilder like AnyISO, but which file would I edit? As far as I can see, there are 2 grub.cfg files and a menu.lst in the ISO.