There are many Lightbox clones this days. Some are fancier, some are lighter, some use jQuery, some do not. In this wast set of options, I found one I think I will prefer from today: FancyBox – fancy image zooming tool
It is based on jQuery and is a cool alternative to existing solutions. Here are some features:
If you are a WordPress newbie and you are willing to learn it, the 1st step would be to find a really good guide of how to create a WordPress theme from scratch. Small Potato from WPDesigner gives a really detailed tutorial for beginners. Best this about those is that he gives a free PDF download of all 3 book parts.