No bootable device found ( Install windows on Mac )
The problem is that your MacBook doesn't have BIOS, it uses EFI instead. I won't go into the differences between the two, but the Boot record you've created on your USB is for BIOS not EFI.

There are two fix this, one requires a PC with Windows, the other doesn't. 

Windows method:
Go to this link: http://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html

It'll explain the steps you need to follow to have your MBP boot from the USB.

Other method:
Go to http://gparted.org
Download and run GPARTED
Convert your MBR volume to GPT

Now you're EFI will recognise your USB as a bootable device :)