aliases under tomcat

[Julien Martin]

Hello,
I would like "fr.localhost" and "en.localhost" to resolve to "localhost".  I have 
created the aliases under tomcat but I was told by someone on the mailing list that 
further configuration was needed on the dns side.  I am running w2k. Can anyone tell 
me how to configure my w2k machine please?  (I know this is half relevant to tomcat 
but maybe someone can help me.)
Julien.