You don't have a router so you get to learn how to setup ICS. http://www.wown.com has all you need to know (which I will not duplicate here) but one thing. Many will install a Firewall before they get ICS working.
Bob
i got a problem...
i have to xp pro OS's on 2 pc's networked.
i can share files, and the printer but not the net...
im using a 10mbs enthernet PCI cards (x2) and a cable... i got a USB exturnal ADSL modem on BTyahoo BB but it says i can do it through one modem but the pc upstairs wont connect i keep geting the error when you cant connect (when working offline and try to open eg. www.cnet.com) DNS/IE error anyone help????

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic