A friend of mine had put together a 2 part video tutorial on utilizing on how to use the piano roll and implemt midi.
Newton's Laws of Music MIDI Edition Lesson 1 - Basic MIDI
http://www.sidllc.com/Forums/metal/MIDI/NLMMIDIEdition1.avi
TechSmith Screen Capture Codec.
http://www.free-codecs.com/download/TechSm...pture_Codec.htm
The second installment of Newton's Laws of Music - MIDI Edition. This lesson go through the basics on Velocities.
This one as a DIVX file so the size is about half what it was in the first lesson.
http://www.sidllc.com/Forums/metal/MIDI/NLMMIDIEdition2.avi