bootable CD-ROM image to memstick image?

[Warren Block]

On Sun, 29 Jun 2014, Ian Smith wrote:

> I have a bootable BIOS/EC update CD image for a Lenovo X200, with no CD.
>
> It contains the same good ol' DOS 6.0 BIOS update program as ever, after
> a loader from not so good ol' Nero Burning ROM, after 64KB of zeroes.
>
> root at x200:~smithi/biosupdate # file 6duj48us.iso
> 6duj48us.iso: # ISO 9660 CD-ROM filesystem data '6DUJ48US
> ' (bootable)
> root at x200:~smithi/biosupdate # mdconfig -f 6duj48us.iso
> md0
> root at x200:~smithi/biosupdate # mount_cd9660 /dev/md0 /mnt
> root at x200:~smithi/biosupdate # ls -a /mnt
> .       ..
> root at x200:~smithi/biosupdate #
>
> Is there a generic way to convert this into a bootable USB image?

Possibly the update program and data is in the El Torito floppy image. 
I've converted floppy images to boot CDs, but not the other way.  This 
might help: http://arstechnica.com/civis/viewtopic.php?f=16&t=308491