This is where you describe yourself, the photographs as a whole, or whatever you like. You use the 'title' attributes of each of the images to set the captions. Try to make all the images 600px. All images will be resized to this width to be displayed (bigger and smaller), so it makes sense to use images of that width.
It is extremely easy to add images to this template. The images are formatted using an unordered list (using Galleria), so go into the source and find the ul / li tags with the images. To create new ones, simple copy and paste one of the <li> lines, and select your new image, and set the caption using the 'title' attribute.
You can use this template in any way you want, all I ask is that you please leave a link back to me somewhere in the page.
I used jQuery + the Galleria plugin, along with the 960 Grid Framework. Most of the sample images come from the WikiMedia Commons HDR photo library - a few came from a royalty free photo pack.