[cobbler] stand alone iso to usb

I have been going through some old mailing list emails trying to find an answer to this. I need to take the output buildiso standalone and put it on a USB. Has anyone successfully done this recently? I tried feeding the iso into unetbootin to create the usb. That resulted in 'no operating system found' when attempting to boot from it. I am in the middle of trying it with livecd-iso-to-disk. Any other ideas? Thanks!