Product Customizer - AJAX or Flash

This will be similar to a t-shirt customizer. Step 1: Select the product type. Step 2: Select product color. Step 3: Customize product. (Add/Subtract features, designs, extras) This can be done either with AJAX or Flash, but in the end will be completed as a PHP session variable that can be passed to a shopping cart. Only bid if you have a demo of this functionality or can describe how you would make it would work.