how to "enable" custom project's plugins in a generic way

[Yaroslav Halchenko]

We have some custom plugins for nose and we run unittests+doctests
with a helper runner script which adds them via addplugins option.

I bet there is a way to avoid that and register/enable plugins
(without running whole battery) in module/__init__.py so that
"nosetests module" would enable them without any additional runner
script/command line parameters.
custom PluginManager? how to override the default one?

Thank you in advance