We may be talking about the exact same thing. The problem with the "reg hack" method you suggest, is its simply "blanking out" 2 entire keys which are obviously there for a legit reason. The data within them is destroyed unless you did an export.
By using Microsofts TweakUI, you can simply turn this feature off OR on by ticking a check box. In my opinion its a better and nicer way to do it. Besides, TweakUI offers a lot more tweaks that are fun to play with.
Which ever one chooses (.reg key or TweakUI) they both get the job done.