[Users] MAC in use when importing/cloning a VM

Hi, When importing VMs into our export domain, they appear in a list that allows me to restore them. The restore window allows to clone instead of restoring, especially in case of a pure import. Many imports went all right, but some recent one failed due to a MAC address already in use somewhere. The import window does not seem to give a way to change the network setup of the VM, even if it is imported and not started. I don't know how to modify the interface setup of a vm before importing/cloning it? -- Nicolas Ecarnot