I am using Magento 220.127.116.11 and I added configurable product but the problem is it is not reflecting it's child product price. and sometimes images are also not reflecting while selecting a color. I added all the simple product images to the configurable product.
Check this link: Change product image for configurable products
Also there's an official Magento documentation: http://www.magentocommerce.com/knowledge-base/entry/ee1141-ce191-configurable-swatches
Hope this helps