InterNation

Hey all! How can we work around the fact that "registration-only" fails due to "no name servers"? I know that if a client wants to only register a domain without hosting, a cPanel account needs to be created and I believe domain parking would be the solution here... Does anyone know how to automatically add domain parking when a client doesn't choose a hosting plan? -Or at least to set domain parking as a prerequisite? PS: If there is another solution besides domain parking, please share.