Forgot to mention I also updated installation.txt to document that the
windows installer should be run as administrator to update the registry
properly.

Bern is there anything more to do here?

I don't have any idea how the windows installer works. I assume
it's built using setup.py bdist_wininst??

Is requesting elevation maybe as simple as change the
release directions to include --user-access-control force ?

From: https://docs.python.org/2/distutils/builtdist.html

Starting with Python 2.6, bdist_wininst supports a --user-access-control
option. The default is ‘none’ (meaning no UAC handling is done), and
other valid values are ‘auto’ (meaning prompt for UAC elevation if
Python was installed for all users) and ‘force’ (meaning always prompt
for elevation).