I have searched long and far for a solution to a dilemma I am having with BootCamp Assistant. I have a data doubler in my MacBook Pro 8,1 (early 2011), and am unable to make a bootable USB to install Windows via bootcamp. I have found a couple threads that pointed me to the info.pilst file in the contents folder found when you right block on the BootCamp Assistant and select "show package contents". When observing this file I found that nothing I do in terms of editing the file is registering with BootCamp Assistant and allowing me to create a bootable USB. 
https://forums.macrumors.com/threads/1558653/
The link attached is one of the many threads I have observed regarding this problem. I am running Mavericks OSX now for what that's worth, and throwing my SuperDrive in for the installation is not a viable option either. I have tried to do this, and found that my SuperDrive is not being recognized for some reason, but that's separate problem all together.
https://forums.macrumors.com/threads/1558653/
The link attached is one of the many threads I have observed regarding this problem. I am running Mavericks OSX now for what that's worth, and throwing my SuperDrive in for the installation is not a viable option either. I have tried to do this, and found that my SuperDrive is not being recognized for some reason, but that's separate problem all together.