[CentOS] repositories

I think perhaps I missed something in some discussions over the last 
week or so..  I was reminded last night that the repository for CentOS 
4.1 had been moved to "vault" .whatever ..  Is that correct?  What 
should I have in the /etc/yum.repos.d/CentOS-Base.repo ?

For future reference, is there a document that gets updated when the 
base repository changes?

Thanks..

-- 
Snowman