I don't have the MAP tank. Are you buying the actual MAP Tank or another product? As far as I know, the MAP tank comes in two versions. The original that uses a cut down CE2 cartomizer and the DCT MAP Tank that uses the punched dual coil cartomizers. These two videos my help you in your quest.
http://www.youtube.com/watch?v=YICp6ZrO_aE&feature=related