I have netgear wireless router which my son has in upstairs room to connect and play games online. My daughter and I have wireless laptops which sometimes interfere with his gameplay. We also cannot connect unless we are withinj a certain range (have large house) How can I extend the signal? We are on btbroadband, can we just access laptops via the phone sockets which are in every room? Can I use the old bt modem in a room to connect the wireless laptops? please help.......