PHP and schedules tasks/events

Hi all, I am in need to schedule reminder emails and was wonder how to do this via PHP / mySQL For example, I would like to give my user the ability to sign-up for an event and have an email reminder generated X amount of time before the event. I appreciate any feedback on how to do this... Thanks! Don Wieland D W D a t a C o n c e p t s ~~~~~~~~~~~~~~~~~~~~~~~~~ donw@dwdataconcepts.com Direct Line - (949) 305-2771 Integrated data solutions to fit your business needs. Need assistance in dialing in your FileMaker solution? Check out our Developer Support Plan at: http://www.dwdataconcepts.com/DevSup.html Appointment 1.0v9 - Powerful Appointment Scheduling for FileMaker Pro 9 or higher http://www.appointment10.com For a quick overview - http://www.appointment10.com/Appt10_Promo/Overview.html