Below are examples on how you can control what is shown on these websites.
The External Data Provider also gives alternative feeds in commonly used formats. These are useful if you have external readers or a script to read them already. These feeds are available in XML, RSS and RSS2 so it should fit a wide variety of readers. The system defaults to RSS so if you leave off the type, that is what you get.
The URLS to access these feeds are:
XML - www.yourdomain.com/forumpath/external.php?type=xml
RSS - www.yourdomain.com/forumpath/external.php?type=rss
RSS 2.0 - www.yourdomain.com/forumpath/external.php?type=rss2
You can refine the listings by specifying forumids in the path. For multiple forums separate them with a comma. This will limit the feed to the specified forums only. (Below example uses xml as type, but it works with rss, rss2, and js too)