While I'm asking....
I have a guestbook page I would like to add to the navigation. I edited the sidebox and the page opens fine, but I'd like it to open in the cart main page area. I know, I should research how to do this on my own, but there are so many pages with so much inter-connected data... it's easier to have someone say "look in this folder on this page and add this code here".....

Thanks for being so helpful.