[@ashfame Participant 15 years, 9 months ago]

Right, there is no official manual.

Find the integration guide on this page – http://blog.ashfame.com/bbpress/

Try this plugin for sync – https://bbpress.org/plugins/topic/wordpress-bbpress-syncronization/

Create my-plugins folder with 755 permissions in root of bbPress and put plugins there. You can activate them from dashboard after login.

P.S. – Being to the point doesn’t hurt. Write as much required.