This example shows how to create a custom module for a site. We typically create one custom catch-all module that we can use for one-off site customizations where we don't need to create a unique module. If they are general site tweaks that cannot go in template.php, we put them here. Please read the book Pro Drupal Development for a much better understanding of how all of this (and everything else Drupal) works! DrupalBook.com.