This menu is a Suckerfish menu system and is disabled by default but if you prefer to enable it you can set the menu to "2" in the "Template Configuration". In Joomla 1.5 will have the option in the template parameters.
This is the horizontal image menu which is enabled by default
This is the horizontal menu located at the very bottom of the page in the demo , create a “Flat List” menu module, and set the module class suffix to "-bottom"
You can easily configure this template with the below options. Once you have installed this template login to the administration of your Joomla site. In the admin navigate to your Joomla templates from the top menu: Site > Template Manager > Site Templates. Select "kitephotography" and then click "Edit HTML". You will then see something similar to the following (Note: In Joomla 1.5 these options will be available the template parameters:
// Enter color1 or color2
$s5_color = "color1";
// Enter in 1 for image menu, 2 for suckerfish and 3 for neither
$s5_menu = "2";
// Enter in pixels how tall you would like the main body
$s5_mainbody = "770px";
// Image Menu Configuration
$s5_backimage = ""; // Enter URL here if you would like a background image for the image menu
$s5_float = "left"; // Enter on which side you would like the menu to appear
$s5_width = "220"; // Enter in pixels how wide you would like each menu item to open
$s5_menucolor = "#FFFFFF"; // Enter an HTML hex value for the links on the image menu
$s5_menubordercolor = "#FFFFFF"; // Enter an HTML hex value for the border on the image menu
Be sure to check the tutorials on the demo for more explanations and examples.
If you still aren't sure or have any more questions don't hesitate to ask on the forum.