Cron clients for Windows to find they are expensive, or have bugs and are not stable. So I wrote a very simple yet powerful script that handles all the basic functionality of Cron. It has been stable and used in production for about a year. The source code is in Python and you can read it, it is a simple page. I have also created a version for Windows with an installer that doesn't even require Python installed in the target machine.
You can find the project here: http://sourceforge.net/projects/pycron Emilio. -- http://mail.python.org/mailman/listinfo/python-list