
Make the WINDOWS partition both the system and boot partition (you could get fancy and make two, but I didn't bother). Start up Win2USB and work through the wizard: Choose the. Choose "format" and format the partition to MS-DOS. Right click on the "WINDOWS" volume that should appear in windows explorer. Plug the drive into your windows device, preferably via a USB 3.0 port. You can do steps 6 and 7 while this is occurring, but it should be pretty fast. iso from step 1 somewhere the windows account from step 3 can see it (i.e. I used a bootcamped macmini running windows 7.

Get access to a windows device as an administrator. Anyway, make at least one partition on the drive named "WINDOWS" with at least 20 GB of space (could use less, but if you want to be able to do anything later, more is better.) The format of the partition is unimportant at this point.

I did this using MacOS's Disk Utility because I knew how.
CHRONOSYNC DMG FILE INSTALL
Partition the drive you intend to install windows on. It gets very confused and tries to install windows to your internal drive around step 10 if you do. DO NOT have your bootcamp usb stick plugged in during this entire process. iso of Windows 8.1 (it can also do earlier versions, but this is the one I know). The drivers are what we care about.) A windows machine with administrator privileges and (preferably) USB 3.0 ports a Macintosh computer (duh! :D) img of windows 8.1 (should work with other versions, but this guide won't be quite right) a windows install usb stick you created with boot camp (make sure you had the second option, "Download drivers," checked. I think it probably does exactly what you described, but it does it for you.

I haven't tried that and it might make the difference, but I found an "easier" way: I found the following recipe at the link below.
