Well, I wouldn't say it's mandatiry, but the EULA I agreed to prevents me from telling you how to use RM by altering the Protexis registry in notepad. If you want to use the software, it's designed to have a net connection so it can validate your license and crap like that.
Of course, this IS America, land of geting around paying for shit you want, and I'm sure there's something on the interwebs somewhere that can show you how it's done.