If I understand this correctly you will deploy another, new host wit ESXi 4.1?
Before you start to copy the VM's files, ensure they don't have any active snapshots (no -00000x.vmdk files in the datastore), then use e.g. Veeam FastSCP as mentioned in the above provided link. Once the files are on the new host you just need to right click the VM's .vmx file in the datastore browser to add them to the inventory.
André