Hi, I am trying to install Windows 7 onto my Retina Macbook Pro through Bootcamp, however whenever I get to the screen where it says where the OS will be installed, it only mentions my external hard-drive which I do not want. Do I have to first create a partition for Windows 7 that Bootcamp will recognise on the SSD? Once I install Windows 7, can I use my external hard-drive which is formatted in Macintosh Journaled to save files .psd, .ai files from Adobe? Can I indicate how much of the internal SSD I want to partition, e.g. only 120GB?