Unfortunately it doesn't work.
As soon as you click 'install-bootroot-windows.bat' it boots and then just hangs on the HTC Quietly Brilliant screen.
It boots immediately once you click on the .bat file. There is no time for anything to be pushed to the phone.
After you get bored looking at the boot screen and long press the power button, the phone just boots normally... no root.
EDIT: I manually booted the bootroot.img file and still no root.
EDIT 2: The boot image kills all data connections.
EDIT 3: I flashed the original boot.img and radios are still FUBARed. I suggest you pull this until you have tested it.
Never, ever conform