Convert vCAC Designer workflow to a vCO workflow.

I'm currently using vCAC Designer to modify the WFStubMachineProvisioned workflow to call a PowerShell script to add a DNS record.

In the script, I collect the info below, then use it later in the script to add the records. Works great.

$Hostname = $Properties["VirtualMachineName"]
$IPAddress = $Properties["VirtualMachine.Network0.Address"]
$ZoneName = $Properties["ZoneName"]

How would I go about doing this in vCO?

I do have the vCAC 6.0 extensibility package installed in vCO 5.5, but I'm new to vCO and am looking for an example of how to pull and pass vCAC VM properties in a PowerShell script.