http://www.fedora.us/wiki/LegacyRPMUpgrade
This document is almost complete. It only needs some cleanups, the rpm
packages copied into "legacy" channel and packages to download further
clarified. Please suggest further improvements.
Read the page. I think I have found a solution to the RPM upgrade
problem. You CAN avoid upgrading RPM and still use Fedora Legacy
updates. Is everyone okay with this solution?
Warren