I used a set of instructions to create a bootable USB drive for ChromeOS. I want to install ChromeOS in VirtualBox. This is apparently impossible to do from a USB drive. I tried mounting the 9GB .img file as a floppy controller, but it errors out.
The only thing I can think to do, in order to get this installed in VirtualBox, is to write the .img to a USB, then try to copy the USB to an ISO and try to boot as a live ISO, as that is what would normally happen on a hardware install. (Reboot PC, boot from USB, ChromeOS boots, run a few commands and it's installed)
I'm making an attempt with ddrescue, but I don't imagine that'll work.
How can I make a bootable ISO to accomplish this task, or what other solution can you recommend to reach the end goal by any means?