Is anyone using the Fake Fresnel shader from the "Shader Ops" addin (Digital Carvers Guild) with Carrara 5?

Have downloaded the demo and followed the instructions exactly, but I cannot get the effect I expect, which is as follows (click here):

Following the demo, all I can come up with is something like the following:

The demo only allows a Fake Fresnel parameter of 33.33 value.

Thanks
Richard