It's tricky, but could be done. The modifications would need to be in:
ajax-gizmo.php (the framework for the HTML of the rotating banner),
ajaxgizmo.js (the script that does the rotation of visibility of the HTML created by ajax-gizmo.php)
the code is yours to modify as you see fit. If you do modify it, keep in mind that those two files are
considered 'replace with new copy' if updated in the future.
Good luck, and best regards,
Ken