Question: How do I boot into windows 7 if i didn't use the boot camp assistant to initially install windows? Laptop Specs: MacBook Pro 2011 (purchased stock) OS X Lion Intel i7 dual core 4 gigs ram Internal 120 gig Corsair SSD (Installed after receiving laptop) External 500 gig Toshiba Apple HDD (Original internal HDD installed into usb enclosure) I also have a windows pc Background on what I have done: I have successfully installed Windows 7 onto a usb drive. It is fully bootable and working while in the usb enclosure. If anyone is wondering how i did this i will give instructions at the following post http://forums.macrumors.com/showthread.php?p=13169519 . I have a minimal amount of free space available on my internal ssd on my mac so i do not want windows on the internal drive. I am trying to boot into windows on the external drive on my mac. Shouldn't it be possible? If it is how do I do it?