Disklavier

I'm just beginning to learn how to work with midis. I use Cakewalk to 
edit and the dkvutils to convert to Yamaha. I have many questions as 
I am just starting out. I took my first piano lesson last week! One 
question I have; how do I edit the song title and author that appears 
on the LCD display when a midi plays? Sometimes it displays the name, 
sometimes a .mid filename but mostly it reads "untitled". Any info is 
greatly appreciated. Also, any other tips on how best to use Cakewalk 
to convert midis would help many on this board. It seems to be a 
popular program. 
Many thanks