There are times when you want to allow the Super Admin to edit those extra fields but not the editors/contributors of your site so this is one way to do it:

PHP:
  1. < ?php
  2. /**
  3. * Change the node form
  4. */
  5. function phptemplate_node_form($form) {
  6.   // echo "<div style='direction:ltr;'>"; dprint_r ($form); echo '';
  7.  
  8.   // Hide 'Log message' text area
  9.   $form['log']['#access'] = FALSE;
  10.  
  11.   // Hide the author collapsable box
  12.   $form['author']['#access'] = FALSE;
  13.  
  14.   // Hide the publishing options collapsable box
  15.   $form['options']['#access'] = FALSE;
  16.  
  17.   // Open the file attachments collapsible block in a full state
  18.   $form['attachments']['#collapsed'] = FALSE;
  19.  
  20.   return drupal_render($form);
  21. }
  22. ?>