On my Mac, *nix based systems I configure pip by modifying the files:
~/.pypirc
~/.pip/pip.conf
The documentation that I've found so far, says that under windows you need to set the HOME environment variable and place the files in:
%HOME%\.pypirc
%HOME%\pip\pip.conf
However, this doesn't seem to work for me and when I try to use pip to install a package from one of our alternate servers the package can't be found. Any suggestions?
Links I've found so far
I wasn't able to pip to use my mirror repos auto-magically just by setting up my configuration files, but I was able to use the repositories by using the -i option:
pip install -i http://url.to.my.repository package_name