...Simply download the package and unpack it into the Haxima data directory (you may want to create backups of the original files). You will need to start a new game. This adds another inventory pane, and eight new items at various locations around the Shard.
EDIT:
Please let me know you're out there--visit the forums and take a moment to tell me what you think. I'm new to this whole business, so user feedback is vital!