I just helped out a little with that one you linked here in the community.. and it does NOT require the PowerShell plug-in or PowerCLI - it is all vCenter api calls using the vCenter plug-in.
If my answer resolved or helped you, please mark it as Correct or Helpful to award points. Thank you!
Visit http://www.vcoteam.info & http://blogs.vmware.com/orchestrator
for vRealize Orchestrator tips and tutorials - @TechnicalValues on Twitter