I downloaded Fedora 20 from here, created the USB media using the liveusb creator and then started the install, it wouldn't verify my installation source (usb) and i couldn't install. I thought my HASH/md5sum was bad so i checked it. The sha 256 matched.
Next I tried to input an alternative location, I chose the following as I was installing on older hardware (32bit only),
this allowed the installation to continue, so I'm posting this here incase it helps others