Core Drupal is pretty powerful. Out of the box you have blogs, forums, pages, and books. You can highly extend the functionality of the software by adding modules to the mix. There are two ways to acquire modules. The first is to use contributed modules. Contributed modules are developed by members of the Drupal community and the contributed back for others to use. The second way is to develop a module yourself. This tutorial will focus on installing a contributed module in Drupal 5.x.