My mother-in-law currently has a Genie and 1 client. There is a single wire leading from the dish into a 2-way splitter. From the splitter, one wire goes to the Genie and the other one to the client. She'd now like to add 1 additional client and would like to order through Amazon (since it's cheaper than ordering directly through DirecTV). My question is, can I purchase a 4-way splitter and use one of the additional outputs to go directly to the new client? Amazon also has DirecTV approved SWM splitters. She currently doesn't have a "power inserter". Would we need to add this too?