Windows PowerShell Software Development Kit (SDK) is now available as part of Microsoft Windows SDK for Windows Vista. Microsoft Windows SDK can be downloaded from http://www.microsoft.com/downloads/details.aspx?FamilyId=C2B1E300-F358-4523-B479-F53D234CDCCF&displaylang=en
Windows PowerShell SDK contains:
The documentation can also be found on msdn at http://msdn2.microsoft.com/en-us/library/aa830112.aspx
To install Windows PowerShell components from Microsoft Windows SDK, please select the check-boxes as shown in the attached image.
Hemant Mahawar [MSFT]Program ManagerWindows PowerShell