Can I add more pages than what comes with the template package?

SHORT ANSWER: YES

Colin’s Answer:

You can ‘copy’ or ‘duplicate’ any of the ‘blank’ pages (or even the pre-designed pages) in your site, to create as many new pages as you need.

To be ABSOLUTELY accurate, you can include up to 25000 files (not page, but pages, images, files) in your website, without FrontPage grinding to a complete halt. That’s if your server is running FrontPage extensions as most of the hosting accounts will be.