Vista - Using PowerShell script to create a list of Scheduled tasks

So I have several tasks that need to be repeatedly scheduled for various dates. We will be getting a list of dates soon and I was hoping to create a script that will take something like an xml file with a list of times and will create the scheduled tasks we need. Because we will need to schedule about three separate tasks for each of the some 20 times we are scheduling things, the more automated the better.

Thanks in advance