Two new documents are released by Microsoft related to VMM 2012:

• Building PRO Management Packs: This document provides an overview and step by step for creating a simple PRO-enabled management pack.
• Upgrading VMM 2008 R2 PRO Management Packs to System Center 2012 – VMM: This document describes the steps for upgrading a Virtual Machine Manager 2008 R2 PRO-enabled management pack to System Center 2012 – Virtual Machine Manager.