Hi Carlo (70 Amiga User) I am also the developer of AROS One x86, some years I had asked you if Rufus could write an ISO of AROS x86.
Later I solved it by installing AROS x86 on Pendrive, and creating a USB Image from the Pendrive.
Now I have encountered a problem with Rufus 4.x, basically the USB Images (Pendrive) created with Rufus 3.x are no longer compatible with Rufus 4.x
Which version do you recommend I use in the future?
If you want to do some testing, you can find the AROS USB image (created with Rufus 3.x) on my link:
https://sites.google.com/view/arosone
Then test the Live Pendriver created on a supported PC, on older PCs it should boot.