Yes, you can network them with a switch. However, if you have a broadband Internet connection that you want to share, a router is better (http://duxcw.com/faq/ics/diffrout.htm).
I have not written articles on networking Windows 2000 and XP; however, ther is a lot info on the subject in this forum and in our FAQs. XP should detect most network adapters and automatically install the network. Win 2K may do the same, and has excellent help on the subject. Larry