Have you already downloaded the full installer package? If so, look at the configurator.
Click on the graphics, add a page. Then all those bubbles you have are simple display buttons. So click the button, add the image. Also add the background image (looks like you want it on stretch mode since it wont tile/centre well). Save and then to make it do something add a Fusion Brain instance, add your digital outputs, and save. Go back to your buttons and make the vote option "trigger output" and select the output you want.
To get it into Centrafuse, I dont know the specifics about embedding, but you should be able to run a program inside Centrafuse (embed) and make it look seamless.