Group google account credentials

This module looks really cool. I've had to do some integration between Drupal and the Gdata API before with some youtube related project, and it's nice to have the potential of starting with so much of the work already done.

I have some questions concerning how to use google accounts with organic groups - I don't understand the directives at admin/settings/droogle.

They way I interpret it, the module lests you create a google account, associate the google account to an organic group, and lets drupal users that are a member of a group use the google documents for the google account. Is that right?

I am including a screenshot of the form.

In the first fieldset, SITEWIDE ORGANIC GROUPS OPTIONS, there are two textfields.
I undertand that each field should contain the machine name of a node field.
I am interpreting the first textfield to concern google username, and the second one to concern google the google account password for the username. Note that both textfield description say 'OG google password' though, so I might be wrong.

In the second fieldset, OVERRIDING GOOGLE USERNAME AND PASSWORD FOR INDIVIDUAL ORGANIC GROUP(S), there is only one textfield. That is what is confusing me most - I would expect that there would be a textfield for the google account username, and one for the google account password. Again I undertand that these are node field machine names.

Can you help me understand?

Thanks!