Here is the original thread by the author. It contains all the instructions and updates. 

Your picture looks like it might just be a seperate blend file to store materials. Simply create a scene like you want it, with some spheres, ect, create your materials and apply them to the spheres. Remember to name each material. Save as MyMaterials.blend

Later on, when you want to add one of your previously created materials to a model you are working on, click on File at the top/left corner and choose Append. In the menu, locate the file MyMaterials.blend and select it. You will now be presented with different items to be appended. You want a material so choose Material. Now you will see a list of the materials, so simply click on one and the click the LoadLibrary button at top/right. Now, select your model and go to the materials buttons (F5) Click the little arrows beside Add New and you will see your newly appended material. Click it and your done! 

Which ever method you decide to use, good luck and have fun.