boost signal with second router?

I am a realtor and I just moved upstairs from my office. I have a
wireless router (a) in the basement, three floors down, and another one
(b) up here. Is there a way I can pick up the signal from (a) and direct
it into (b) which I would use with my Mac tower. My laptop has Airport,
the tower doesn't. I don't want to run a cable up here, and my broker
is well aware of what I am trying to do.

How can that be accomplished? Router (b) is a Linksys WRT54G. Not sure
what router (a) is. We have a highspeed cable connection, not dsl.

Any assistance well appreciated.

Cheers.


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Use powerline networking to make an ethernet bridge from the
downstairs router to your upstairs router using the building's AC
circuit.

http://www.netgear.com/Products/Powe...rs/XE103G.aspx

Get the 85 Mbps version- supposed to be more reliable.

Steve