Correct, you would have to ram clear it to enable it. Some OS's allow you to change printer type without ram clear but if it is disabled it locks it. If it was enabled, you would need to have some sort of TITO device installed in order to use it though. (something like Bettor Tito on classifieds first ad) otherwise it will hand pay as soon as you press cash out because there is nothing there to generate a validation id or venue information.
Fun games but grab you a bite to eat and read a book while waiting for games to change, also the monitor gets pretty warm so you might want to watch ambient room temperatures
Edit- fixed tiny text