The title says it all. Relatively easy to re-use. Adapting to the scale of your scene might however be a bit fiddly. No need to unwrap, it uses box mapping. Please note also that the color of the environment plays a great role in the result.
Warning: You will hear your GPU scream and beg for mercy... and the rendering time will hit the roof but rest assured that this material won't eat your kittens. ;-)
Bigger images here: http://goo.gl/9dZQk