While it is not possible to copy a VM snapshot directly, you can create a new VM template from a snapshot and then use that to make copies of the snapshot. Templates are a "gold image" - ordinary VMs which are intended to be used as master copies from which to create new VMs. Once you have set up a VM the way you want it and taken a snapshot of it, you can then save the snapshot as a new template and use it to create copies of your specially-configured VM in the same resource pool. Note that the snapshot's memory state will not be saved when you do this.
If the original VM used to create the snapshot has been deleted, you can save it as a new template as follows: