Since this seems to be a built on network adapter then your choice is to purchase a new network card or -b=Nic[/b] as they are sometimes called.
Go HERE and you can see the differences in the cards. I myself would suggest either getting a D-Link, Netgear or a Linksys card. Look around the 20 to 30 dollar range for a good card.
This would mean you would have to open your system to install the card but that should be no problem for you now that we have turned you into a professional at this.
I will assist you with this also.