We used to have a Linksys WRT 54G v8..
It went like this: Telephone line to my ISP modem, modem to the router by cable, router to my PC by cable, router to my other PC wirelessly with one of those wireless USB thingies.
It worked for a while but recently stopped working, so we got another wireless router.. a D-Link. Same installation, we swapped the two routers and installed the disc. It worked for a while, but yesterday, the PC connecting wirelessly won't connect anymore.. I'm not sure what happened..