This will be a quick post, but I recently wasted far too much time trying to get a bootable USB drive set up so I could update my fracking BIOS (the Windows-based updater didn’t work, nor did the ISO based updater. Thanks for a quality product, Intel!).
It was incredibly hard to actually find an easy method that works, but I finally did: http://www.sevenforums.com/tutorials/46707-ms-dos-bootable-flash-drive-create.html