refraction mapping

i saw this amazing pawn from the following website/tutorial

its the amber one, however after downloading the blend file and the refraction map, i couldnt get that result, also i have no idea how refraction mapping would work. can anyone help me and tell me what i need to do?
like set what parameters etc.

it would really help me out.

If you open the .blend and go to the world buttons, you will see there is a world texture applied. Go to the texture buttons and load that saved image into it. Render.

It is a reflection map, not a refraction map.