What exactly is it that you are trying to do? Will you be installing Office
2003 over a new system with Vista pre-installed, or will you be upgrading an
existing system with Office 2003 already on it to Vista? I suppose other
possibilities exist too. If you post what it is you intend to do, perhaps
people can think of likely problems that you will encounter, if they exist.
Saludos cordiales,
Earle