I think you can just dd the CD ISO into the USB. That's what I do, and it's supported: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/Ma

I think you can just dd the CD ISO into the USB. That's what I do, and it's supported: http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/Making_USB_Media-UNIX_Linux.html#Making_USB_Media-UNIX_Linux-RHEL_Fedora-dd http://docs.fedoraproject.org/en-US/Fedora/18/html/Installat... I'm sure you can find the same info for Ubuntu.