Custom All in one SEO tags for dynamic category pages

On the site [login to view URL] Customize the All in one SEO to dynamically generate the description and keyword tags for each category page. The problem is: The category pages all have the same description and same keywords. In each category and each page of the categories; customize the code so that the description and keywords are dynamically generated from the 16 posts that appear on that page. As new posts are added, the description should dynamically change according to the image names and keywords generated by the 16 posts. This theory and type of functionality can be demonstrated with the individual picture posts. Such as here [login to view URL]