you would need to store an staff member's status in the cookie, and also store in some kind of array which mods modded where, and you'll want to take into account that the tables will look fudged up at the bottom with no images there.
You'll have to go into ubb_lib_posting and do some escaping, and unescape in the javascript most likely. I would at least avoid something like document.write for something like css, and changing a class to display: none;
This will most likely require modding ubb_profile.cgi, ultimatebb.cgi, ubb_new_reply.cgi, ubb_new_topic.cgi, ubb_edit_post.cgi, public_topic_page.pl, and ubb_lib_posting.cgi
