It does work with 4.5 if you change a few simple permissions. I will try to find the thread that talks about it. I have it working fine on an 8120 and 8320 running 4.5.
I'm still waiting for an answer. I recall many posts over time by the real "experts" that the 3 key reset is the same as a hard boot. So, I doubt there is an answer to this question. Why not recommended???