Perhaps it makes sense to break this page up into two sections: One section with instructions for installation of current versions of RT (e.g., currently supported versions) on current distributions and another for the legacy stuff?
Perhaps even a legacy page for the old stuff. For instance, is anyone really going install RT3 on Fedora Core 1? I don't think so. Just showing current versions on recent distros would make the page less daunting to potential users trying to install.