Instructions for Bootable USB for Road Hog?

I am trying to create a bootable USB flash drive, so that I can run a Full System Restore on a Road Hog.

The page with the official instructions is dead:
www.flyingpig.com/support/documents/BootableUSBFlashDrive.pdf

Can anyone direct me to a newer page, or tell me what specifically I need to use to create a working bootable drive?

Thanks
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