I am wanting to order a new inspiron 9200 and when I configure a unit it ask if I want a 8X DVD+/-RW Drive then sometimes it ask if I want 8x CD/DVD burner (DVD+/-RW) with double-layer write capability. Are these both the same, just written up differently. Also if you get a double-layer write capability do you have to use a double layer DVD or can you use either type and just burn on one side. I have tried calling Dell and keep getting conflicting info on this. Can anyone out there help. Thanks