I just read about the feature namespaced paths in Symfony 2.2 and was thinking about if I now have to copy over the old files if I would like to overwrite a single file in a namespace.

Please add the information, that it's possible to have multiple paths registered for the same namespace. These paths are then used like a fallback.

https://github.com/symfony/symfony-docs/blob/2.4/cookbook/templating/namespaced_paths.rst