This article will describe a way to make a machine boot from USB even if the BIOS does not support booting from USB.

To be able to boot from USB on unsupported machines we will need a program called PLoP bootmanager. This is a bootmanager that can be burned on a CD or even a floppy disk. This will allow the machine to boot to the PLoP bootmanager and from there you can select the actual device you want to boot from.

To get more information about PLoP and/or the actual software, check out this link: PLoP Bootmanager.