But given no model of what you have, I think a game bridge would be a more effective solution.
Also post 18 or so in the forum sticky shows how I use a spare router to get better coverage for cheap.
I am trying to setup a new Windows 7 computer to link into an existing 802.11 network that is used by other computers. Are there any 802.11 routers that can operate as an expensive adaptor? This is preferred as the routers seem to have much heftier RF sections.
Routers with repeater operation seem to require that the NAT features of the modem be defeated, which is no good for the other computers.