Wired network conflicting with wireless internet access. HELP!

[William]

Heres the situation:

I want to connect my xbox360 to the pc and use the internet for xbox Live and such. So we have the crossover cable running from the xbox directly into the network adapter on the motherboard. Internet is gained from the wireless connection from a router downstairs.

When the wired connection is enabled, it knocks out the Internet Gateway, basically i'm looking for a way for the PC and the xbox to 'share' the wireless card. Anyone know how to do this, i'm pulling my hair out.

 

[William]

Ah I see now. I would have done it the easy way, but the router is downstairs and I don't want a cable running down the stairs and I don't want to spend cash on an official microsoft wireless card if I can do this.