Theming Custom Content Types

Have 7 custom content types, each with 10 to 25 custom fields. Need to improve the user interface, mainly the layout [need to group the fields, change order of appearance, place more than 1 field per line, etc.]. Potentially, for a given content type, have a View layout and a different Edit layout.

Ideally theme each node using "node-content_example.tpl.php". Currently using Bluemarine, however, may migrate in the future, so ensure flexible approach.

For each content type, have set up ckk field permissions by role. ckk field visibility / "editability" is fairly complicated and already set up, need to ensure the ckk permissions continue to function as currently set up.

Utilizing Drupal 5.X and one of the custom content types includes location fields (gcg module).

Please email me directly.
thanks