I'm a newbie, both to this forum and to the Mac, so forgive me if I place this post incorrectly. I have a Macbook Pro 13" i5 w/ 8G upgrade, late 2011, and would like to install Windows 7 Pro with this hardware config I am considering- A Data Doubler with 750GB HD and placing the optical drive from the Mac in an aftermarket, USB connected external case. I would like to load Windows in this new HD and be able to, with a option keystroke boot at start-up select this new HD, have Windows open, the default at normal start-up the Mac OS X on the stock drive. I am assuming I would have to load the Lion operating system in the new Hard Drive, make the partition for it just large enough to hold the OS X and then the rest for Windows 7 Pro. Can I have Windows run on the HD without Lion OS X and bootcamp? I had an old tower running XP and want to import all my files and programs. How much extra memory should I allocate to software and security updates for the OS X partition? I also have a 1 TB WD for Mac I will Velcro to the cover and the same for the optical drive. Can I partition the external memory for Mac AND Windows? I don' care about pretty, just want to have two machines in one.