Bootable usb from Windows/Linux?

I basically need the exact equivelant of this:
https://help.ubuntu.com/community/Ho...al_approach.29

Except FROM linux/windows, as I don't have access to OSX. thanks

Have a look at https://github.com/abock/image-usb-stick, it can handle ISO's directly (no conversion needed) and is a 'one-stop-shop' for writing USB thumb-drive (far simpler than dd calls ;-)

Does this thread cover what you are looking for: http://ubuntuforums.org/showthread.php?t=2149682 ?

Unetbootin can run on Windows and Linux, download the correct version here.
http://unetbootin.sourceforge.net/