The PowerShell management module for Hyper-V contains about 100 cmdlets that will let you manage your Hyper-V infrastructure by using scripts. Out of the box you can only manage this through WMI and we all know that WMI is not so user friendly. The PowerShell module is available onto codeplex...(
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Read the complete post at http://scug.be/blogs/scvmm/archive/2010/02/02/download-the-powershell-management-module-for-hyper-v.aspx