The field group module (http://drupal.org/project/field_group) was introduced with Drupal 7 to replace similar functionality that was part of the Content Construction Kit (CCK) module for Drupal 6. For Drupal 7, much of the CCK module was added to core as the
field_ui core modules. However, there were two major areas of functionality offered by the CCK module that were not migrated to Drupal 7 core, and those were
user/node reference fields and field groups. The field group module enables you to add groups to wrap fields for the node edit form, and through the manage display admin screen of a given content type.
In this section, we are going to once again undo something that we have ...