I had seen that, but thought it was saying to edit that existing registry key and then change the setting in Sounds & Notifications.
I had misread it before and didn't realize that we were supposed to add that key, and THEN we would have that setting in Sounds & Notifications!!!!
It works perfectly (I didnt try the cab, I merely did the regedits/adds)!
EDIT: sorry, I stand corrected.
I tried the regedit and thought it worked, but it didnt. I deleted the regedit and rebooted and installed the CAB and rebooted (and I had also set the Sounds & Notifications for Bluetooth warning).
I still get the Bluetooth Headset Disconnected warning bubble icon that won't go away until I dismiss it.