It isn't crystal clear to me from the documentation how to do this - I'm most familiar with using VMWare ESX.
If I understand correctly, the only way I can do this is to create a template from my existing VM and then create a copy from the template. http://cloudstack.apache.org/docs/en-US/Apache_CloudStack/4.0.2/html/Admin_Guide/create-template-from-existing-vm.html# I'm using CloudStack v 4.0.2.20130420145617. The information contained in this e-mail and in any attachments is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. This message has been scanned for known computer viruses.