We have indeed a VMware infrestructure with the vCenter virtualized. This VM is a w2k3 and also has installed SnapDrive for Windows. Its disks are stored on a NFS datastore. This is very important since SMVI 2.0 only supports crash consistency snapshots on VM with these types of disks. So if you vCenter has disks stored on an NFS datastore, you can take SMVI 2.0 snapshots of it.