Disklavier

Hi, I own a number of pianosmart titles and would like to create a customized cd that will play alongside a customized floppy.  Ideally, I would like to take, say a few songs from one and a few from another and burn my own audio cd.  Can I then copy the corresponding mid files to another floppy and somehow get them to all work in sync?  Seems like it should be doable but I don't understand how the disklavier system syncs the audio cd with the floppy.  I just don't like to play all the songs and hate to switch discs just for one or two songs.

Any help would be appreciated.