Ok, sorry I wasn't clear. I have a d-link wireless router downstairs. I get maybe a bar, 2 if I'm lucky. I have a linux computer, an ibook, an APE, and a D-link router. If the linux server is closer to the router then I am and it picks up the signal, then it can rebroadcast it via ethernet to the APE, and then the APE will take that signal and rebroadcast so it'll be closer to me, hence a better signal. I know speed probably won't change, but at least it'll be easier to hold on to the signal.
Basically I want the APE to think the server is a modem.