Once installed and booted, open chromium and install the tab rotator extention

In the extention options set remote url and set the url to http://spy.byte.net.nz/rotator.php?name=<display_name>. Do a test fetch and ensure the json is loaded.

Quit chromium and in a terminal run

rm -f ./install.sh &&  wget http://spy.byte.net.nz/install.sh && sudo bash install.sh

This script will reboot the hosts and they will boot as a display screen.