Backbox conflict with Tooltip, Overlap Image Viewer, and Popup Window

I began creating my site (http://christinemillerdesigns.com) with the Backbox image viewer from javascriptkit.com which worked great until I added Tooltip, Overlap Image Viewer (both from javascriptkit.com), and Popup Window Generator (from www.dynamicdrive.com). As a result, Backbox no longer displays properly but the other three scripts work fine. How do I get the Backbox to work again? Any suggestions will be greatly appreciated.

Sounds like a conflict between function and/or variable names within the scripts.