[PGTheme] SImple Newbie Question

Hi All,
I've just installed the latest Gallery 2.2.1 and am using PGlightbox theme.
All I'd like to do is change the default summary that comes up on the lefthand side of EACH page.

I've used an early incarnation of Gallery once before and had the same problem. I think I just created a new top level album and deleted the other - thus making one main top level gallery. However, I can't seem to do that this time with PGLightBox.

What am I doing wrong? I've tried to "Edit Album" but the changes I make aren't reflected on the page...

...HELP!