There are 2 versions of Lightbox in the WordPress plugins directory, and only one of them works properly with PhotoSmash. The one you want is Lightbox 2 by Rupert Morris.
There are a number of other Lightbox-like plugins that you can use as well, each with a slightly different flair than Lightbox. One of my favorites is Shadowbox JS. Very similar, and you don’t even have to change your Rel setting. There’s also Fancy Box, Thickbox (not a bad choice since the script is being loaded for the PhotoSmash forms anyway…this reduces your overall load times for your visitors), Gray Box, Slim box, you could get old naming them all…and many of them are very cool!
