(2) You could place all your content ('about' and 'contact' information) inside a div on your page and selectively hide or show the content (when the appropriate links are clicked) by changing the CSS display value (to either 'none' or 'block').
(3) You could place an iframe on your page, give it a unique 'id' and use links on your page which, when clicked, load the corresponding URLs into the iframe using the target attribute (targeting the 'id' of the iframe).
(4) You could duplicate the page with your menu, use it as a template and add unique content to each page. You could them link them all together into a seamless site.
If you are looking for an automated solution, you might like to take a look at another of our products: Showkase.
Showkase is a PHP web application which allows you to create complete portfolio web sites (integrating multiple galleries) online.
Showkase also allows you to create non-gallery pages (such as 'About' and 'Contact' pages) and all of this is done automatically within the Showkase interface without the need for any manual coding at all.
Demo sites created with Showkase can be found here.
If you would like to take a look around the Showkase interface, you can log into the Live Demo Admin here.
Showkase can be purchased as Showkase-Standard (which comes with SimpleViewer-Standard and Juicebox-Lite, the free versions) or Showkase-Pro (which comes with SimpleViewer-Pro and Juicebox-Pro).
(The only difference between Showkase-Standard and Showkase-Pro is the bundled viewers.)
As you already have SimpleViewer-Pro, you could purchase Showkase-Standard and upgrade it to use your SimpleViewer-Pro files by following the instructions here.
SimpleViewer Support Team