Get either (a) crossover cable(s) or a router and a few ethernet cables.
Daisy Chain:
Connect a crossover cable and then connect one end to the computer with the net and the other to the computer without the net, if you have more then two pcs, connect a cable like so except with one end to the previous computer and one end to the one you wish to hook up. In the end, it might look something like this (ignore the text, I found it in a random place):
Router:
Firstly, get the router, plug your internet into the router (your internet modem must be using ethernet) then plug the rest of the computers into the router. Now you have a standard router configuration without needing to inbstall net drivers. You might have a setup a bit like this:
