This text along with the page title, price and thumbnail titles can all be found in the directory called "text". The "text.php" file needs to be opened in a text application. To change colors, styles, etc. you need to open the "style.css" file found in the main directory.
Remember a few things:
1. Index.php is the very first photo page.
2. To make a new template directory, just add a new folder with client name and copy contents of template directory into the new client directory. Then change necessary items (ie. styles, text, and photos in corresponding directory).