You can make your guestbook look however you want by writing a CSS stylesheet for it. To begin with, however, you may want to use one of these pre-written stylesheets, either as a basis for your own or until you can write your own:

In your guestbook admin area there is an example of how to link a stylesheet to your guestbook. To use one of these example stylesheets, simply replace the href value with this:
href="http://www.guest-book.co.uk/styles/{name of style}.css"
For example,
href="http://www.guest-book.co.uk/styles/mintygreen.css

We are currently building a library of styles that people may choose to use or modify for there guestbook - if you don't find a style you like (and can't write one yourself) a suitable one may be created at some point in the future.