I am trying to (without much success) to figure out how to upgrade my system using CVS

If I run the following:-

cvs -z9 -d:pserver:anonymous:@cvs.sourceforge.net:/cvsroot/wikipedia co -rREL1_5 -P phase3

I connect to the server and it downloads the files to a directory called phase3 in the directory from where I run the command.

What I have is a pruned version of Mediawiki in a directory called "w". I then use symbolic links to that directory.

How do I modify the command line so that it updates to the directory name I want and only updates the files that are present??

Thanks

Laurie