And this is my very very simple Material Room setting for the effect.

I am using a simple plane and applying my shader to it.

Nuts - too big to image upload here.  Hang on - will upload to my deviantart account and post link in separate message in this thread.

OK -

see image of my shader settings here:
http://ibr-remote.deviantart.com/art/Shader-for-HUD-effect-122053259

Eternal Hobbyist