Ok, so I'm sold on getting a new 11.6. My current first revision MBA packed up a few months ago and the hard drive needs replacing. I live in China and getting to an Apple store is quite a bit of hassle so I'd much rather do the job myself HOWEVER I don't know what to do with the HD once I've installed it into the MBA. I don't know anyone with install disks either. If I purchase my 11.6, I'll get the USB drive with it though. So, am I able to install Mac OS from the USB onto an old MBA with a completely new HD?