I adapted an old printer to print the lyrics on some of our rolls.
There is a YouTube video of the printer and a roll that I have
printed at  http://www.youtube.com/watch?v=rXEHqrDRLRw
  and
http://www.youtube.com/watch?v=UW2y0nky6YA
 

It was not too hard to set up.  The main problems were setting up the
initial print file and getting the lyrics to line up with the roll.
Once the print file is set up the actual printing is quite fast.

Regards,
Paul Bell, UK