Set up of Services on Windows Server

I need a package that I can apply on my MS Windows 2003 server that will allow me to set up Windows Services. I need them to execute web pages that manage data systems. I need full options of timing - to be able to execute every x minutes during certain hours of the day if possible - if set hours of the day is not possible - we can control that on the executed page. I have had one like this before but did not allow detailed control that we need - so this has to be fully flexible on set up.