Description of problem: When installing rawhide, there is a very specific tie from boot.iso to the installable packages. It would be nice if there was a looser 'bond' between the media so that at least yesterdays "boot.iso" could boot todays rawhide tree. Feature request, wont be for fc6, maybe fc7. This could also be applied to the RHEL series.
This is something that I'm thinking about a bit for post-FC6, but it's likely to also involve moving more towards a rescuecd sized image for kicking off the install.
Fedora 8 should allow you to use the rescue image basically with "any tree of packages"