With a little bit of formatting and editing, you should definitely be able to do this!
You'd sync the Main Display Text to your Stage Display so that the main verses are on the back screen. After that, you can add text boxes, or pictures of the chords, to that screen so that they are showing up there. It would take a bit of work, but it's doable!
Let us know if you have any specific questions on that!
Ben Wagner, MediaShout Support.