My ADSL modem is in one part of my house and feeds a Belkin N1 router running WPA encryption. This in turn links a PC running XP, 2 laptops running Vista, an XBox 360 and a PS3. I just manage to connect to a Linksys USB network adaptor on the other side of the house. This connects to a laptop. My query is can I substitute the Linksys adaptor for a Belkin FSD 6231 router which will then allow me to wireless network the other side of the house including XP PCs and print server. The alternative would seem to be to run CAT 5 between the two routers but that will entail a great deal of upheaval and may not be sanctioned by the "Boss".
I have not yet seen a router that can function as a wireless range extender, though they may be available. Most folk would just buy a range extender instead, I think, if their better half doesn't like wires!
I had a spare Linksys WRT54g wireless router after I moved house and from cable to adsl.
I found some good (free) firmware on the web that converts the router into a wireless bridge. This now mimics my own Belkin router, allowing me to connect my xbox to the net without a cat 5 cable running through the house. There are 3 spare ethernet ports so I could connnect another 3 devices with cables.
I'm not sure if anyone has written similar firmware for your Belkin - I can't see anything in the links below. However, you can pick up working WRT54g's from ebay for a tenner (click here £30 will get you a new one - maybe reconditionned. All you need so then is flash the firmware yourself and the bridge is up and running.
Here's a link to some background, explaining the steps to flash...