I bought the 10.5 "family pack" retail DVD. We have two desktops and 3 laptops in our family (only one of them thus far an Intel machine -- first gen MacBook Pro). It looks as though none of them can create a backup DVD. What Macs have dual-level DVD writers? It seems that's what I need to create a Leopard DVD to take with me on the road. Thanks so much, Jim Robertson --