Here is an interesting idea. Why not offer some whitelabeled user videos on how to use the Xenforo software? That way people can republish them on their forums to help train new members and get them acquainted with all of the amazing features offered. Here is a good example:
Again, the videos I created are in relation to active discussions, or part of documentation or when someone requested something. Feel free to go to http://xenfans.com/docs and go through the manual for the end-user. If you desire an instructional video (short and to the point) about a specific feature, feel free to request so in the forums there.