OnOff SHIM shutdown image?

First, thank you for making these great products available to us! I love my recent upgrade to my little arcade machine with the onoff SHIM! The only thing I would like to change is the shutdown notification. Currently it shows a notification on the console that the button has been pressed and will safely shutdown (or something to that effect). Instead of showing a message on the console I would love the script to instead load an image that displays, like a ‘shutting down’ image.
Is this possible somehow?