I have a mid-2011 MacBook Air. How can I delete the OS X partition entirely? In other words, go from dual boot to single boot Windows 7 64-bit? Can I use some sort of disk imaging tool to back up my Windows partition, then use something like GParted to delete the OS X partition and make just one single partition, then restore the image to that? What imaging tool will work for this? I've used Acronis TrueImage in the past but am concerned it may not work for Mac.