Adding a vertical tab the the content type form page How can i add a vertical tab to the content type manage form page?  

I want to add a vertical tab that has a form like the ones it currently has.  For example: it has menu settings, display settings, etc.  I want to add a tab that ties a theme to a content type.  Can you someone help me out?

Thanks
Try this. Or read about hook_form_FORM_ID_alter()

function mymodule_form_node_type_form_alter(&amp;$form, &amp;$form_state) {
  $default_value =TRUE;// auto_nodetitle_get_setting($form['#node_type']-&gt;type);

  $type = $form['#node_type'];
  $form['mymodule'] = array(
    '#type' =&gt; 'fieldset',
    '#title' =&gt; t('mymodule'),
    '#weight' =&gt; 0,
    '#collapsible' =&gt; TRUE,
    '#collapsed' =&gt; false,
    '#group' =&gt; 'additional_settings',
    '#attached' =&gt; array(
      'js' =&gt; array(drupal_get_path('module', 'menu') . '/menu.admin.js'),
    ),
  );

}