You can test this out at http://zencartdelia.com/testing/index.php?main_page=product_info&cPath=23&products_id=180

Hover the additional images placed under the main image and the main product image changes to the additional image.

Simple and extra light-weight solution!

Contribution also available at ZenCart.com: http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=1967

The free support thread is located here: http://www.zen-cart.com/forum/showthread.php?t=183112. If you wish support on merging this with another jQuery mod, please contact me through this website. That would not be considered to be free support.