I have those wireless routers in my house. I have the Lynksys Wireless-G Broadband Router WRT54G (top pic) for the main PC of the house, which has the cable modem. Then, in the PC upstairs, the secondary PC, I have the NIC (Network Interface Card) card with the antenna (2nd pic). Fortunately, we didn't need any expanders/deflectors. Only negative about it is that when the house phone rings, the waves ntercept the signal and you lose cennection until the phone hangs up.