[Plugin: Shadowbox JS] Completely Lost – want to show images as a slideshow

I don’t know what I’m missing here—-I don’t find any information anywhere about how to use the plug-in. There are no usage files, no instructions, nothing that I can find.

I am using WP 2.8.6 with the Thesis theme. I want to add a series of images for each post as a slideshow. My preference would be to put them in the Thesis provided “multimedia box” but I could use a “feature box” and remove the multimedia box as an alternative.

The problem is I have not idea how to even start the procedure to make it happen. I can’t find any documentation, either on the plug-in page, WP or here.

Can someone point me in the right direction?