Server 2012 Standard license and VM license for windows instances

Hi,
A question about VM instances on standard server 2012 license exists here 
I  cannot link it here as my account is not verified. The topic is titled "Windows Server 2012 Standard License and VMs"
My question is tad different...
If I understand this correctly, 1 windows server standard license provides support for 1 Physical Operating System Environment (The VM Host /  POSE) and permission to run 2 Virtual Operating System Environment(VOSE).
Does this imply that I can install 2 additional instances of Windows Server 2012 Standard Edition on the permitted 2 VM instances on the server? Or... should I purchase additional licenses for each VOSE that runs windows?
Does the standard license provide rights to run  2 Virtual instances AND offer install and activation rights for 2 MS windows (virtual) environments AND install and activation rights for the windows host?
If license is require for each instance of server 2012 running on the VM ... can I avoid purchasing additional licenses for operating systems, say, if I run 2 Centos operating system instances in 2 VOSE?
Please help!
Thanks.

Licensing questions should be asked of a trained Microsoft licensing specialist.  I haven't seen one of those lurking in this forum.  www.microsoft.com/licensing.
That said, licenses are assigned to the physical host, not to VMs.  The License you assign to the host grants you the "right to run" addition virtual operating system environments running Windows Server.  It does not grant you additional licenses. 
Licensing for Microsoft Windows Server operating system is controlled by Microsoft.  Licensing for any other operating system is not covered by the virtualization rights of the Windows Server operating system.  Therefore, if the CentOS virtual machines
are properly licensed by whoever licenses them, you can run however many instances that license allows.
A single Standard Edition license can be installed on the physical host granting you the right to run up to two virtual instances of Standard Edition.  However, if you run additional services, such as file services or Active Directory or IIS, etc.,
on the physical instance, that means you can only run one additional virtual instance of Windows Server.
Free advice is worth every cent.
.:|:.:|:. tim

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