In Power Gallery 2, go to the Choose Design tab. Click the settings link for the Grid + Lightbox design, in the images section you can set the height and width for the full size images
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.