Please find enclosed the screen shot of our Oscommerce 2.3.1 site.
We have installed Supervish Horizontal Jquery Menu contribution: [url removed, login to view] . Its visible as blue menu.
Now, the winner must have esthetic and design skills to fit-embed it into our horizontal menu template style and shock us about how perfect is the result (an idea is given in PPT enclosed)
We are not that demanding and the job is very simple for someone who knows CSS.