Generate Product Preview Image?

Hi!

Am trying to configure Ubercart to "build" a product image based on options selected such as:

http://tinyurl.com/yjychnv

Where the user selects colors, etc. and then gets to preview an image of the product based on those selections prior to ordering.

ANY help on how to accomplish this is appreciated. Have installed Ubercart -- other modules needed?

TIA!