[Fedora-livecd-list] boot livecd iso?

question: how can i boot the livecd distro from a hard disk partition, hopefully with the persistent option? i have found a lot of pages describing how to do this with a USB stick, but i have not been able to find clear instructions on how to do the equivalent thing with a regular disk partition. i have the fedora livecd iso image file on my disk. i can mount it under linux. is there a way to boot the iso file directly, without wasting a CD? or to make another disk partition boot the livecd distro? thanks in advance for any help.