I think he meant, in the batch file. You have to look in device manager for the COM port, and see what number it is assigned, and the put that in the batch file. I think that is what he means.
That is the problem when I istall the WINUSB, the device dissappears in my device manager along with the com port, check the link i posted up to. I have the newer version which is somewhat different then the one they used in their how to.