Recently, I had to flash my laptop BIOS. It had a very old version, A13 and the latest version is A34. But my laptop is running ubuntu 14.04 and the dell site provides a windows exe, E6400A34.EXE. So, this is what I did:
1. I used a small usb drive I have, formatted it fat32
2. went to the DELL site, found the latest bios for my E6400 laptop and saved that file to the usb drive.
3. I d/l the sysresccd iso (about 435MB) from sysresccd.org and burnt it to a CD.