An added note:
I have experimented (in the past) with adding the chords (as well as lyrics) into midi files. This is a cool way to have the correct chords pop up on the keyboard's screen, when you are 'playing along' on the keyboard, with a standard midi file. Kind of like a built in lyrics and chord chart inside your keyboard. Beyond my initial tests peformed which confirms that this all does work, I never seriously took to task the job of embedding chords and lyrics to all my standard midi files.