the most economical wat would be to install Internet Connection Sharing which comes with windows 98se, ME and 2000. for information on how to set this up check out this link (for windows 2000):
<A HREF="http://support.microsoft.com/support/kb/articles/Q237/2/54.ASP" target="_new">http://support.microsoft.com/support/kb/articles/Q237/2/54.ASP</A>
ignore everything i say