Well, its also possible on <a href="http://drupal.org">drupal</a>, with <a href="http://drupal.org/project/ubercart">ubercart</a> . I assure you that in Drupal, we do not attempt to sell modules that were once free, or in that case, sell very other module. However, if you are using a custome template, theming in drupal may be a bit of an uphill task. <br>