Forum OpenACS Development: is it possible to backport package inheritance to v5.4?

I have read in IRC about "how hard would it be to backport the package inheritance to 5.4?" and I wonder if that is possible.

At UNED, we are now upgrading from 5.3 to 5.4 in our production servers, in order to use the cluster feature. But We'd like to have also the package extension enabled for our next developments.

Is there any roadmap? is it possible to patch the 5.4 somehow?

Thanks