[support] Theme a CCK input form

There is a fantastic handbook with the name "Theme a CCK input form" that I used for another site and it worked perfectly. For this other site, however, it fails. I am trying this method: http://drupal.org/node/101092#comment-262746 in the comments of that handbook page, yet the function function phptemplate_node_form($form) { in template.php is never called on node/add/d which is my CCK content type. In fact print_r($form); reveals that $form is empty. This site was built (or mostly built) by someone else so I don't know what they may have done. Anyone have any ideas about what is going on? Thank you very much. I appreciate the assistance. Fred