Is the Skytap Helper application required to make sure that each machine in a multi-VM configuration that has been imported from a single template has a unique MAC address?
Yes. As you can see on the official web page, this is Skytap Helper that will help you to make sure that each machine in a multi-VM configuration, imported from a single template, has a unique MAC address/host-name. In order to download and install the utility, check the Installing Skytap Helper page.