create a gallery/slideshow with featured image like in online stores

I have an online store. What I would like is to insert a main image 400px x 400px and then under that MAIN photo have 4 other thumbnails. When you click the thumbnails the main image changes. How can I achieve this?

The built in WP gallery does not use a main image, so that doesn’t work. It just shows a grid layout of thumbnails with a lightbox effect when clicked.

Is there a plugin that does this?

My theme has portfolio options, but thats very time consuming to create a portfolio item for each instance.

Thanks,
iso