[Pharo-dev] ConfigurationOf

In Pharo 3.0 there is a new class "ConfigurationOf" which I can subclass for my configurations. But then my config is not loadable in Pharo 2.0. The problem is that when people migrate the configs often are adopted for Pharo30 and still work for Pharo20. So one can use this new shiny common superclass only for new Pharo 3.0 configs onwards or is there a backport planned ... Thx T.