Joomla Plugin Enhancements - Joomlisting

I have a site that has a customized version of a plugin called "Joomlisting". My client is wanting to customize it more in order to easily duplicate events and change the date/time on them. [login to view URL] [login to view URL] When I'm logged into the frontend I can see a list of "My Classified Ads". (This is the first view in the video) I want to be able to check the box next to the event and click a button called "Duplicate" This will then make an exact copy of the checked event. (note the system should only let you duplicate one event at a time) Once a Duplicate is made the viewer should be prompted to change the date/time for that new event. (in an overlay view) The date/time fields are just a text entry field technically and need to stay in this exact format (as can be seen in the second view of the video). You can see these dates and time in the second view of the video -> "Start Date/Time" and "End Date/Time" Please also note, we use the exact same plugin (Joomlisting) for two sections of the site "For Sale" and "Events & Shows" Items are hidden/shown based on what area you are in. These changes should ONLY effect the "Events & Shows" listings. OR, if it is less work. The duplicate feature can work for both listings, but the Date/Time prompt should never show for the "For Sale" items.