If you're using Jaguar, I think compatibility with Windows sharing is built-in and turned on (visibility of other computers and ability to access, that is. 10.2 by default isn't sharing).
if you want to share with Mac and PC users, open up System Prefs and click the 'sharing' tab. Now check-mark the sharing services you want to enable.
if you want to share with Mac and PC users, open up System Prefs and click the 'sharing' tab. Now check-mark the sharing services you want to enable.