Main Item Pic specific to attribute choice

I was wondering if anyone knew how to get the main pic to change once a specific attribute was chosen. So, say by default the picture is a blue shirt. When a customer chooses green from the color options, a pic of a green shirt will replace the blue shirt. I noticed in the attributes manager, you can add alternate pics to specific attributes, but that merely displays the pic below everything else on the page. For a cleaner look, I was hoping to just replace the main pic.

I've seen this done before on numerous sites, is there a way to do that with this backend?

Many thanks

Rich

Does anyone at least know what I'm talking about? More than a few have checked this post out, and it seems like something that is a little bit common...

Any helps is greatly appreciated...

Thanks, Rich

There are some ajax swapper addons you might check out, at least for inspiration if nothing else. You can see them discussed in the All Other Contributions area, and the downloads in the downloads area.

thanks byte that was a push in the right direction.