ISO from bootable USB

Fortunately I have never had to re-image a DL.2 or AXON's HDD
....yet.....
It would be great if we could have the option to do it from a bootable USB (a la RoadHogs) instead of having to resort to an external USB CD or DVD drive (only for DL.2 as AXON has a drive built in.....but wouldn't really need it anymore if we could have bootable USB drives).