This mod will take your largest image (the one that appears when a visitor clicks 'larger image' on the product info page) and create the small and medium images for you, with the smallest flie size possible.

http://www.zen-cart.com/index.php?ma...roducts_id=117

Follow the installation instructions carefully.

For example, your 'a solar flower' product image is 375Kb in size - it should be less than 10Kb. Your pages will load much more quickly, with no loss in image quality.