Can I create a branch for only part of my CVS working copy?

[Andy Kuo]

Hello,

   I have a CVS'ed project which contains several subdirectories under 
the main project directory.  The problem is, I would like to create a 
branch for only certain subdirectories (to test out an new 
implementation of my design).  Is this possible?  Also, if later on 
someone does a "cvs checkout -r <branch-name> <project>", would their 
working copy contain only the subdirectories which were branched?  In 
order to get the latest revision of the main trunk as well as the latest 
revision of the branched subdirectories, would they have to do the 
following?

cvs co <project name>
cvs update -r <branch name> <subdirectory>

Thanks,

Andy