installing custom handlers without modifying the package

I see that custom handlers (such as the "teams" handler) can be added to apache-openid, but as far as I can tell, it requires placing additional files/directories within the existing python package directory. Sadly, this effectively means that in order to build upon the existing work, I have to either modify the ubuntu-supplied package or modify the sources and replace the ubuntu-supplied pacake with my own.

It would be nice if there was a way to install my custom login handler as a separate python/debian package instead of bundling it with a modified original. Perhaps calling pkgutil.extend_path() in apache-openid would make it play well with other packages that want to extend the namespace? In the future, Python namespace packages might be useful here.

http://www.python.org/dev/peps/pep-0382/