I'm not saying that this method is practical or better than using an empty snapshot, I just wonder if this would work, because it sounds so logical. 1. You backup your actual system partition, containing WinXPproSP2 + Applications + FDISR (+ Data) 2. You install winVISTA 3. You install FDISR 4. You copy/update from primary snapshot to a new archived winVISTA-snapshot on your external harddisk 5. You restore the image of your actual system partition 6. You copy/update from archived winVISTA-snapshot to a new snapshot. Now you have a winXPproSP2-snapshot and a winVISTA-snapshot, but without using an empty snapshot.