tagging files via script

[Largent, Jim]

I have a script that tags files based on an existing tag.  I use it to be
selective in what gets into the next release.  Currently I use rtag and pick
up all files with the existing tag in a particular directory.  What I want
to do is be able to selectively re-tag specific files.  I know that tag will
allow you to tag specific files, but it requires the CVS directories in the
local directory and rtag only works with directories.  I know I can do this
with RCS.....is there anything I should be aware of before I start using RCS
to tag the specific files?  Does CVS rtag to anything radically different?
I'm still on 1.10 of CVS, but plan to upgrade soon.  Any
thoughts/suggestions?