You can make your pages look anyway you want, but there are design elements
that are "synchronized" across the publication for a consistent look. Also
you can't just insert another template design into an existing publication,
but you can insert any design element. Add a blank page, open a second
instance of Publisher with the new template design, and copy and paste
between. Or, build your site with multiple Publisher files and link them
together....lots of different ways.

DavidF