By installing modules in Drupal 7 the long and slow way you will be able to see where the files go in the Drupal 7 file system. Once you understand this process it will give you a greater appreciation for Drush as well as give a better understanding between Drupal Core and contributed modules.
This is part of my presentation, "What is Drupal?" originally presented at the 2012 Minne*bar unconference in Minneapolis, MN.
