Yes, per the FAQ at johntillersoftware.com, that is the recommended way to backup the game - either burn the download to CD or copy to a USB drive or external HD.
(04-04-2011, 06:46 AM)Ricky B Wrote: [ -> ]Yes, per the FAQ at johntillersoftware.com, that is the recommended way to backup the game - either burn the download to CD or copy to a USB drive or external HD.