VCAC naming convention model entity

Hi

We have VCAC setup and i am trying to customize the naming convention of the VM provisioned from VCAC.

I am using the VCAC plugin to call the VCO workflow at ExternalWFStubs.BuildingMachine stub.

Can any one help with VCO script to update the VCAC entity with the new name.

I have referred the link Working with vCloud Automation Center IaaS entities but coudn't get a way how to get and update VCAC VM entity name.

Thanks,

Deepak