For the current official version of the PowerShell Module for System Center 2012 Orchestrator Web Service please install it from the Orchestrator 2012 R2 installer.This blog post has more information:
http://blogs.technet.com/b/orchestrator/archive/2014/02/09/service-management-automation-integration-with-orchestrator.aspx
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PowerShell Module and Examples for System Center 2012 Orchestrator Web Service
This download contains a PowerShell module and test scripts that provide examples of how to use PowerShell to automate Orchestrator via the web service. The download zip package contains the following:
- OrchestratorServiceModule.psm1
- Test-GetCollection.ps1
- Test-GetInstance.ps1
- Test-GetInstanceDetails.ps1
- Test-GetJob.ps1
- Test-GetRunbook.ps1
- Test-StartRunbook.ps1
- Test-StartRunbookAndGetInstanceDetails.ps1
- Test-StopJob.ps1
- Test-StopJobsOnServers.ps1
- OrchWebService.pptx
v1.2 contains minor fixes to support PowerShell 3.0
v1.1 contains support for accessing runbooks via name (rather than GUID).