advanced boot options

[geole]

Hello
In order to better seek the problem, I have just installed the new version which allows to reserve a user space for future personal use.

I managed to simplify the problem as much as possible by renaming the ventoy directory which manages persistence

I still cannot introduce a personal option with the ubuntu 20.04 version because no boot choice is offered to me. So I can't add a personal option to it.
ISO quality control starts immediately. This is followed by the proposal to choose the language, the keyboard, etc.

I noticed that if I did the same thing with the ubuntu version 18.04.1, after having validated the ventoy grid, the grid of the menu of choice of actions to do (which allows to install or to try) is proposed. I can then change the options without difficulty.

I noticed that version 18.04 is based on this command  /casper/initrd.lz
while version 20.04 is based on this command /casper/initrd

I also noticed that your script is testing the presence of /casper/initrd   but not the presence of /casper/initrd.lz