K2 is the popular powerful content extension for Joomla! with CCK-like features. The version used in this Demo site is 2.6.1. K2 was built as a complete replacement of the default article system in Joomla!. Install it like any Joomla! extension, import your articles from the default Joomla! article system and you instantly get a host of new features for your existing content.
The 3rd party component K2 is NOT included in RocketLauncher. You will need to download them from Get K2 and configure them on your site.