I would like to use some aspects of IPB outside the framework. So for instance, I'd like to use the header on the header of a WordPress site so I can make it appear part-of the IPB site. I've attached an image with red markers to show the area I want to include in the WP header.
You will need to integrate somehow Wordpress into IPB to get the auth sessions to work in the wordpress directory also. There are some plugins that can integrate wordpress with IPB but its not easy to do.