Hi Rich,
I’m not sure I understand exactly what you are after, so I can’t really offer a solution here. The thubnails below the slider will move only if there are more than X images (taking more than the total space availabe below the slider). Otherwise they just change opacity level when selected (or when the slider moves).
In any case, you will have to modify geodirectory.js on line 17 following these docs : http://www.woothemes.com/flexslider/
Best way to do that is to dequeue that script from your child theme functions.php file.
Enqueue and register function for geodirectory.js are in geodirectory_template_tags.php line 104/105:
wp_register_script( 'geodirectory-script', geodir_plugin_url().'/geodirectory-assets/js/geodirectory.js' ,array(),GEODIRECTORY_VERSION);
wp_enqueue_script( 'geodirectory-script' );
Copy and rename geodirectory.js in your child theme and in functions.php enqueue the new script with your mods.
Hope this is enough to get you started.
Let me know,
Thx