How to schedule VMs to startup and shutdown

I’m running several VMs (Mainly windows XP) on a 2008 server under Hyper-V.
I’d like to automatically schedule some of these machines to startup and shutdown according to a schedule. To limit availability to the times when people are supposed to be in the office to log into them.
How can this be achieved??

So basically it is pretty easy with PowerShell

1. Install PS
2. Get the library written for managing VMs http://www.codeplex.com/PSHyperv

3. Write your PS script which looks like something like this:

   . c:whateverhyperv.ps1

   Stop-VM XXX

   Start-VM XXX

4. Schedule it http://ss64.com/nt/schtasks.html

HTH

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