I have an IMG file that I'd like to copy into an empty USB and boot from it, how do I go about doing it?
Format the usb as vfat, or if you want a persistant partition let me know and I'll add those instructions too later:
Copy everything over:
Then just make your grub.cfg. Shouldn't be too difficult. Or you just just leave it blank and boot with grub commands if you want. Each time you try to boot it though it'll take something along the lines of: