I had the same problem, and I had to have a wireless router connected to the phone line at one end of the house to send a signal to my computer in the other end.
One other thing that works, is that you might have to get a 40 foot ethernet wire, and connect it to the wireless rounter to the computer, to get the signal to your computer, which is a pain.
Or if other people around you have wireless routers, then all you need is a pc card to pick up the signal, but then we need to boost that, if the signal is low. This is the problem I am having now, I am recieving low and no connectivity signals, but can't use them since they are not strong enough. So somehow I need to boost those signals to get them to my computer for free internet.
I am receiving wireless signal via linksys router and outside antenna set up in office at RV. Park. I receive the signal at my RV. via Hawking 15dBi Corner Antenna which is outside my window. I brought the wire inside through the window from the corner antenna to a hawking 802.11b/g Adjustable WiFi Signal Booster. This was to send the signal through the air, across the room to my desktop and laptop. I was told by Hawking Tech Support that this would probaly work even tough the Booster was made to connect to the access point instead of the receiving antenna. It doese not seem to work. Can anyone help me with my problem? My antenna has to be at one end of the RV. to receive a signal and computer has to be at other end. The monitor is digital and I can,t get cable long enough if I put cumputer at antenna. If I extend antenna wire it cuts way down on reception.