This version of Classboxes does not have (yet) the local rebinding. But it should come soon in an another package.
What you can do with Classboxes: - You have namespaces, basically you do not need to prefix all your classes in order to distinguish them from other classes. - You can uninstall a classbox (which can also be obtained from a changeset) leaving the system in the _same_ state as it would not have been loaded. And so, whatever the class extension and the order or loading classboxes.Dependencies are explicit.
A 5mn tutorial (containing screenshots) showing the main point of the model is avaiable on http://kilana.unibe.ch:9090/classboxes/asmalltutorial/