There is no folder named en-US-RegisterLicense.config so I have no idea what you are talking about.
en-US-RegisterLicense.config is the name of the text file you should create if you want a registration agreement, you put that fille in the /Data/MessageTemplaes folder.
The text you put in the file will be the agreement displayed on the register page. The text is up to you but I would not base it on the NRC site.
I would google for "web site registration agreement" to get some ideas of the kind of verbiage others are putting into theirs.
Hope it helps,