internet sharing between w2k and a mac

try a router. you can get one cheap at a local computer store or you can try ebay.

I would go to tigerdirect and buy a switching hub or router. This time of the year, after rebates or not, you can get a good one for under $100. If you wish to configure internet connection sharing, then go through the steps in "my network places" for thew2k computer to recognize the OSX Mac, give it permissions, and set the w2k as the "server"/gateway machine. For simplicity sake, and the fact that your w2k machine will crash eventually, go out and buy a switching hub or router and the cables. You will at least be able to connect to the internet when one of the machines crashes or breaks down.

there are several ways to solve your situation.It is either software or a hard ware solution.
Software: You could use the MS internet connection sharing,or the 3rd party software such as winproxy. Remember if you go to this direction you need 2 network card in the PC sharing the internet.If you choice this challenging route good luck but you are not saving money for you will spend buying network card and more headache.
Hardware solution
I think this is better way ... buy a 4 port linksys cable router and enable DHCP feature.The last time I checked in store it was under $100. Switch or hub won't solve the internet sharing problem for a lot of cable won't give you a static IP adress.