WordPress.org

Upload the addressbook directory to your /wp-content/plugins/ directory ; Activate the plugin through the 'Plugins' menu in WordPress; You can embed a list of your addresses in a blog post or page by putting <addressbook /> wherever you want the list to appear. The HTML generated by this conforms to the hCard microformat standard, which also means that you can fine-tune the appearance of the list via your theme's stylesheet. The default presentation is pretty boring.

Upgrading

There is no need to de-activate and then re-activate Addressbook to upgrade.