[Dirty Harry]

Hi All.
I must start by pointing out that I am still rather green when it comes to xCart, so my questions may seem dumb. I am currently trying to get shadowbox integrated on to our website, but I seem to be having trouble.
I followed the instructions to install Shadowbox, which went well, but with no luck.

Does this code work for any page, and any image?
That is to say, I have an image in the body of a category (that is not part of the product catalog) that I would like to display with Shadowbox, is this possible?
Or does Shadowbox only work for images in the catalog?
Thanks