I am thinking of adding a reciever 510 which I own upstairs so I won't fight with my son over recording time. Question can I add it on line and authorize it there also? Was on their web page but have dial up and may fell asleep while looking for this info and I may have missed the info. I now have a 625 hooked up to a phone line. If I add the 510 will it need to be hooked to a phone line also? And do I have to pay two dvr fees? Thanks Guys