winCVS question

[Saima Iqbal]

Hi,
         I work for a Telcordia, and we have recently started using CVS for
 version control purposes.  I had a question regarding the use of a unix
script via winCVS.  I've developed a script that enables the user to control the
tagging of a whole tree, by running a shell executable script.   The aim
is to refrain from allowing the users to tag source in the whole
tree at random.  So, how do I run a shell script via winCVS?  I know there is
the option to run unix commands from winCVS, but I don't think I can execute a
shell script from there.  Can I do a system call using winCVS?

Thanks,
Saima Iqbal