You can use the admin pages that where created to start adding data to your database for the product information.
Using the eCommerce Database, there are columns for product images, when running the wizard, you can select those columns to use file upload wich will allow you to upload an image when adding the product information.
to add the data bridge pages to pages you have already created, use Framework builder plugins:
http://www.webassist.com/tutorials/Getting-Started-with-Framework-Builder