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I will defer to you, deiga, when it comes to Apple's EFI bios emulation. All I know is that my Macbook Pro installed and runs Win7 just fine and I still have OSX installed. My main question is why buy a Apple laptop if you never want to run OSX?
You don't have the "File Sharing" section when you choose the "Apps" tab? The "Apps" tab I am referring to is the same one where you choose which apps to sync and where you can arrange the apps on your home screens. If you are in that tab and find no "File Sharing" section down at the very bottom then maybe you don't have apps with "File Sharing". Another thing that came to mind is whether you have a Twitter client or an RSS client that is pulling info down daily and sticking it in "Other."