Cubemap reflections in bge?

Hey.
So i got a cubemap of the room my character stands in and my character is a knight. I want some stuff pm him to vagely reflect the world so it looks more like metal. How can i get reflections going in the bge using said env. map?
Please include a detailed explanation on how to do it since i saw stuff martin upitis ( i think thats his name ) made but i didnt get how he did it. Im fine with anything just add an explanation on how to do it.
Thanks in advance :smiley: