I actually finally figured it out. I modified the info.plist file to enable the "create bootable Windows USB" function on a non-retina MacBook Pro 2011 13". It was really easy actually. You go to Boot Camp Assitant in the finder and right click (old PC user here that why I call it right click when there is no right click) and click show package contents, copy and paste the info.plist file to your desktop, open it from the desktop with TextEdit, scroll down to the string line that says "<key>PreUSBBootSupportedModels</key>" and delete "Pre" from the string, replace the current info.plist file in the package contents with the new modified version and BAM! "Create bootable USB" will now be enabled in Boot Camp Assistant! I haven't tried it yet to see if it works ok but it is there now!