Tagging the latest version of previously tagged files in CVS

Some time ago a set of files ware committed to CVS repository and tagged (lets say with TAG1) . These files have changed a few times since then. Today I needed to tag the latest versions of all files that have ever been tagged TAG1 with TAG2.

This

cvs -Q log -R -S -rTAG1 .

gave me the files I was looking for but with /cvsroot/ in front and ,v at the end

/cvsroot/path/to/file1,v
/cvsroot/path/to/file2,v
...

so I had to remove it

cvs -Q log -R -S -rTAG1 . | sed s#/cvsroot/## | sed s#,v#\#

now I could actually retag these files

cvs -q tag TAG2 `cvs -Q log -R -S -rTAG1 . | sed s#/cvsroot/## | sed s#,v#\#`

It did the job but I think it's quite ugly way of doing such a "simple" operation.
There must be a another (simpler | non *nix specific) way!