Here is one suggestion: look at this web page and read the customization
settings. I believe it will do what you want. I love it and it is free, unless
you care to make a donation! This is call "Tool Tip".
http://www.walterzorn.com/tooltip/tooltip_e.htm#download
Here is what I did with it. (Click on one of the photos, then hover over items
in the next page. IE is a little spotty in performance, FF is excellent.)
http://www.goldengalleryofgalax.com/HTML_Pages/Multiple/MultipleItemGallery.htm