Changes to OSCommerce

I'm using a Cre-Loaded installation of OSCommerce. You can find it at [login to view URL]*g.*et. (replace * with letter "n".) Instead of featuring an image on the home page, I want to put a flash slideshow there. The back-end interface only allows me to add an image here. I am not sure what file controls this content, or how to edit this. I need you to edit the installation of OSCommerce to allow me to place a flash video where the image is currently. If you have any questions, please ask in pmb. Thanks, Dave