Disklavier

Hey folks,

I have a Disklavier Mark IV and have several songs I want to learn,  
but I can't figure out how to use the learning function where it  
wiggles the keys and waits for you to play it.  Is there a way to use  
a general midi file for this?  Yamaha music doesn't have the songs I  
want to learn and I have a friend who can actually play it and record  
it to midi for me.

Thanks,
   Brian