to share connection in win2k it's pretty simple.
just go to network connections in control panel and click on your dsl/cable connection. if you have a lan you will see lan connection 1 and lan connection 2. it is more than likely that lan connection 1 is your internet connection. however, to make sure, right click, click on properties and check to see which network card is in the dialog box. if it's not your cable/dsl card, then your other connection is your internet connection.
click on the second tab once you are in your dsl/cable connection properties and check the box that says share this connection.
that should do the trick.