Wanted to get back to you, as to how things went.
The first day I did the 1-2-3-2-2-4-5, he slept all day long.
A couple of nights in the beginning, we did the step 2 alone, twice.
He is so much better!! We don't hear him breathing anymore!! He gradually came off his Doxepin and then the gabapentin. Right now, I am doing the above sequence about every 4 days or so, and taking my cues from him.
Thank you so much for your help!! We have our old Siva back, frisky and constantly getting in the way:)