Open your MIDI file in PowerTracks Pro Audio (or RealBand), and you'll see the instruments separated onto their own track - an excellent way to hear all the instruments individually for that song, and a great way to learn!

There's no trick to it either - just use the File | Open dialog, locate the MIDI file, and click [Open].

Note: Type 0 MIDI files have all channels on one track, and should ask whether you want to separate them. If you accidentally chooses no, hit Edit - MIDI - Extract Channels to Tracks. Typically, Type 1 MIDI files have the instruments automatically separated.
Marketing Representative
PG Music Inc.