If all you are trying to do is listen to individual tracks and see notation, if you start RealBand and choose 'file open' them select the midi file you want, RB will open it on separate tracks and you can play them and see the notation. If as rharv says its a type O midi file, RB will ask you if you want to separate the tracks. Three clicks at most and you've got what you want - using RB its dead easy - i've just tried it. I think BIAB is a false start for what you are ttrying to do.