Python extension distribution without sources

[Berkes Ádám]

I would like to ask whether it is possible to distribute a python 
extension module to an already installed binary package somehow. My 
question is focusing on windows (e.g. there is an installed tortoiseHg 
version), so if I have a .py module, how can I "plugin" this into the 
existing mercurial installation with the least impact and hacking 
possible. Is there any tool for such aim, or a descriptive explanation 
(setting up extension to hgrc is not part of my interest now)?