Creating VM's in mutiple clusters

What is the process to create VM's on multiple clusters in the same computer group in vWorkspace.  I am working with a client who has 4 clusters and wants to load balance the VMs between the 4 clusters.  The client is using hyperV, SCVMM 2008 R2, and vWorkspace 7.2 MR1, and is configured with 4 clusters and 2 volumes.  When I go to a computer group and select Add Computers working thru the screens and I get to Parent Virtual Hard Disk I select the VHD file and the next screen you need to select a Volume it will only show one cluster and one volume, it does not give you the option to select all 4 clusters.  Any assistance would be very helpful if more information is needed let me know.

Thank you,

Linda