Just order a new MBA 13", will receive it in 3-4 days. I want to produce a disk image of my entire Mac OS X disk's contents before I install any app on it. In the snow leopard, I can do it with Disk Utility. But this need to boot from DVD, how can I do it in Lion (no DVD disk) and MBA (no DVD drive)? Is the Time machine the only back up method for MBA running Lion?