To add text or photos to the top of your product category pages, go to Products > Advanced - Manage Categories and select the category from the left. Then click on the General Information tab and enter your text/photos in the Description field. This will show on the top of this product category page.
(Note: You may need to contact us to request to use the Manage Categories tab if you do not see it in your admin. It is only available on some website packages.)