Installation for drupal 5.x 

- replace the comment.module with the file comment.module.dp5
  (and please VOTE here http://drupal.org/node/156475
   for getting the comment.module fixed in Drupal 6 or 7 finally)
  
- enable module in Drupal

- configure the settings for comments, 
  especially
  
  - comment moderation on/off
  - if users must leave their contact info (set to yet, or how shall we mail them?)