Boot Live Disks from a Multiboot USB as an ISO
Normally when you want to boot from a USB stick you have to format it and ‘burn’ an image onto it. It is possible to make multiboot usb sticks that allow you to boot ISO image file directly. Not all live system images, like the Ubuntu desktop images, play nice with the method outlined in that post. Here is an alternative method that will allow you to boot images like Ubuntu desktop as an ISO from a multiboot stick. »