[Zope] Ordered Folder

Hi, at http://aspn.activestate.com/ASPN/Mail/Message/zope-Dev/1054345 I found a hint that Ordered Folder version 0.5.1 is needed but at http://zope.org/Members/srichter/Products/OrderedFolder the version counter only goes to 0.4. An inclusion into upstream Zope was mentioned at this page, but I found no pointer whether this is just done. If yes how could this be used (and why is the later page not updated to give a hint)? Kind regards Andreas.