The HTML and image files are ZIP-compressed.

This tutorial shows you in simple steps how to set up your settings for normal mapping. The text is supported with 23 significant images what makes the recreation really simple. Even the required buttons are highlighted in the images.
Further it explains normal maps in general.
Create a low polygonal version - a high polygonal version - grab the UVs from the simple model - anjust the settings - render the images and compare the results with the RAM Player.