http://blog.moertel.com/posts/2011-03-03-how-to-update-your-servers-bios-across-the-network.html
Based on this: http://www.chtaube.eu/computers/freedos/bootable-usb/
unetbootin method=diskimage isofile=linpe35.iso targetdrive=/dev/SOMEDEVHERE autoinstall=yes