Windows NT, 2000, and XP have built in LPD printing, but Windows 95, 98, and ME don't. However, using the free LPD-Win utility available online, you can still print from a Mac to a printer connected to a Windows machine. This tutorial explains how to set it all up.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030813001044501