Some considerations:
* Snow Leopard license doesn't allow it to be installed in a virtual machine, Parallels enforces that license by not allowing such installation, however, Snow Leopard Server is allowed by its license and Parallels.
* You can only install Lion on a VM from Parallels installed on Lion
* The image posted is of Lion running Parallels with Lion installed on a VM and also a Snow Leopard SERVER VM in the VM list.
* I don't understand from your post if you want Snow Leopard as host and Lion on a VM or the other way around. neither is possible, except if the Host is Lion and the VM is Snow leopard Server, or, you dual boot your mac into Snow Leopard and Lion and then install Lion on a VM in Lion, and try to use use that VM in Snow Leopard, not sure if Parallels allows it or not.
Last edited: Dec 26, 2011