I haven't used Win 8, but I'm pretty sure the mechanics of editing the registry will be exactly the same.
Provided you back up your registry before making any edits and you follow the instructions to a tee, you won't go far wrong.
It's a bit like taking a cold swim - the first time you do it, you'll be nervous as hell just dipping a toe into the water.
The more times you do it, you get more & more used to it