DIY MIDI Foot Controller from Old Keyboard (Mac Only) - free&fast!

How to create a MIDI foot controller for Mac only (10.5+) using only an old keyboard and free software and then map it to loop in Mainstage (though you can use any program really) Super easy! Check out my channel for some vids where I actually use it. Midi Keys (free, Mac OSX 10.5 and above): http://download.cnet.com/MidiKeys/3000-2170_4-31933.html