You can play these Files with Chris Hills's MidiPlay, which shows the notes, or with
Choral Music Tutor or My Choral Part, which work on any internet-capable Device.
If you want a Player with PlayList facilities, I suggest either van Basco's or Winamp .
If you're a Mac User ... you could perhaps try Roni Music's Sweet MIDI Player.
For more about these several Players, see Playing Midi Files.