I’d like to be able to set a custom sale graphic which would overlay on category page thumbs, search result thumbs, and product details page images. Like zappos.com uses a small orange icon dropped below the image. Other sites have them across the top or corner of a product image.
you can have a mid solution by using the watermark for cs-cart under
Watermarks add-on is available for testing - Upcoming features - CS-Cart Community Forums
Yo can place any graphic or text, but not on all images. Have a look, as I said its not all the way but i wiil do the job.