Booting Fedora 19 live USB from within Grub2

This may seem obvious to some, but it wasn’t to me. I have spent the last number of hours on and off ¬†trawling bug reports and forums for the answer. Anyway, I’m not sure whether it makes any difference, but I am running Grub 2 as a coreboot payload. Perhaps that makes the command line incantation slightly different to the norm. Without further ado.

insmod ehci linux
set root=(usb0)
linux /isolinux/vmlinux root=live:/dev/sdb1
initrd /isolinux/initrd.img
boot

Easy when you know how …