BuddyPress.org

All buddypress-specific code goes in Buddypress.php, which gets included if the “Include Buddypress Filters” option is checked.

As far as what Andy’s specific function does or what you need to do, that’s your job The plugin works in WordPress, and I don’t know what specific different criteria BuddyPress introduces, nor do I have a way to test it.

As far as how the plugin works, it’s documented pretty thoroughly both on http://www.justin-klein.com/projects/wp-fb-autoconnect and in its comments (you can ignore the adminpanel code which is obviously not *functionally* relevant…just for setting settings).