Windows Automation Installation Kit is require. To download a copy, click this link http://go.microsoft.com/fwlink/?LinkID=194654
Upon completing this, VMM is installed on the host. Take a peek at my next blog on how I add a Hyper-V cluster to SCVMM 2012 RC at Screencast: Adding Hyper-V Cluster to SCVMM 2012 RC.