You do not need this module (anymore) if you are using one of these privatemsg releases:
7.x-2.x-dev (snapshots of 2013-01-11 or later). Please check the release notes on how to convert and migrate your existing settings.
6.x-2.x-dev (snapshots of 2013-01-12 or later). Please check the release notes on how to convert and migrate your existing settings.
The privatemsg module optionally notifies users per email once they have received a private message. Unfortunately, the sender of these notifications (the email's from header) always points to the site admin's email address (6.x-1.x branch) or to a dedicated but still global from address (7.x-1.x branch). This may lead to the effect, that the recipients of privatemsg notification mails blindly reply to the site owner instead of the originator (or a dedicated "dead mailbox").
This plugin module remedies that by allowing to set either the pm originator or a dedicated (e.g. "noreply") address as the notification mail's sender.
This module add the ability to use the Feature Popups extension for OpenLayers created by Xavier Mamano.
OL FeaturePopups wraps the management of popups and SelectFeature control of OpenLayers.
It works perfectly with OL, with or without the cluster behavior.