There are a few approaches to manipulating scheduled tasks in PowerShell.

* WMI – Useful if you are only going to manipulate them via script. The tasks will not be visible in the control panel applet.
* SCHTASKS.EXE – Works ok, but has a somewhat arcane syntax, and is a text-only tool.
* Task Scheduler API -Best of both worlds, but only on Vista (not XP).