I have three pc's running at my house but one modem with wifi. There are co axle cables running throughout the house because of TV's. I have a problem with connections on the pc's through wifi. If I connect a modem to it it will run fine, then the others have a hard time connecting. My question is this, Can I get a modem for each of my pc's? Can I use the same ip address? If not what is your suggestion on getting a good connection on them. I have installed a extra router but I'm still getting hot spots. Is there a more powerful router out there?