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 [...]

PhotoSmash users, check out the new star rating system!  It’s a simple 5 star system, with some standard features.  You can see a live demo here on Smashly at the PhotoSmash Demo page.
This is still a bit of a work-in-progress, though it should be functional and future changes should be transparent to you.
PhotoSmash Star Rating [...]