Not sure what you have done in details so far, but get the firmware etc (you have downloaded them), extract them onto a USB stick.
Then power down BH200, plug in the stick, reboot. If I recall correctly you will now have the option to upgrade (as it will automatically read the USB stick). There should also be a readme file or similar in the firmware files you downloaded.
There might be some issues with the folder structure on the USB stick, but I believe it is enough that it resides on the root on the USB stick.
Then you burn the region free. make sure you have set the write speed to the lowest possible.
I used a CD-RW when I did mine, so that will work also.
The actual region codes you can find in the faq.
Note that you put the firmware + driver updates on the USB, while you have to burn a CD with the region free program.
(a USB stick will not work for the region free program. ONLY use USB for the firmware+driver)