Anyone know how to that:
http://www.natureshop.co.uk/Products/products-details.asp?ProductID=1012
Only color of product change.
Yes
The color option change is Flash. You can get a basic effect in cs-cart by having a different image for each of the color options of your product. If it's clothing then you'll need a picture of each one of the product colors. Not hard, just time consuming of you have a ton of products and color options.