I noticed no-one had posted a reply on this one so I thought I'd stick my big shoes in and say something.....Ha!
First up, well done on staying sober and it sounds like you've got the resolve and commitment to keep doing it. It's that sort of commitment which will serve you well if you decide to really go for the whole realization exploration which, if I understand your posting correctly, is what you're looking to do. It sounds like you're already more familiar with the Buddha's teachings than myself so I can't really advise anything else there, and if you've read MCTB then you've got the best "how to" manual for any newcomer to the progress of insight that money can buy at present. Get yourself over to
here and familiarise yourself with Mahasi Sayadaw's classic.
As for the your interpretation of what went on during your coma, especially trying to relate it to the progress of insight, be careful not to try to bend your experience to fit the map by being aware of how you're doing this. There's a process involved which I've observed while trying to map other experiences within other situations, it's really easy to mislead yourself by just subtly twisting the memory of it. I can also say that you'll waste a lot of time, which would be better spent with your arse on the cushion and really practising, examining this stuff because it's all made up of old sensations and, although you'll get some psychological insights, following the vipassana technique will reveal more in the present moment which, as you're already aware, will in turn illuminate the past.
Insight cycles just cycle, whether you're aware of them or not they're happening constantly and can be observed. My opinion is that you'll soon find out what each stage feels like if you practice vipassana for any length of time. Once you know what each feels like, you'll be able to see how they manifest in daily life and observe how your experience of being changes during them. Practice will also show you where you are right now but it'd be very difficult for anyone but you to diagnose that with any degree of accuracy. With regards to continuing from where one left off, again I can only say: vipassana.
What I would say is that, given the degree of abuse your body has taken over the years through the booze, consider your current state of mental health. Are you really up to the often painful and difficult process of breaking reality down to a sensate level? I make no judgement whatsoever on you or where you've come from, I only offer this post as a friend on the Path in the hope that you can make the most of these techniques and not place yourself, or anyone else for that matter, in any danger through this. You've obviously had a tough time and it's beautiful that you've found truth in the Dharma, but be aware that this isn't all calmness and light, you're facing up to suffering, something you've done more clearly than many of us, and dealing with some crazy shit that can come up so consider this before you go for it.
You
might have passed the Arising & Passing during your coma, it's only a guess based on what you're saying so far, in which case you would logically have progress into the Dark Night after that. These stages are totally universal, evident in practice and can be observed to occur in the same order, although each person may interpret or communicate the content in different ways, for anyone who practises
any technique which deals with the "spiritual" side of things from, in my experience, magick to yoga. I have a tenuous theory that they occur in most situations which involve active/willed change e.g. learning, although I haven't really looked into much so far. It's quite incredible actually, you'll see for yourself if you pursue this Path.
Anyway, hopefully that's been of some use to you. I can only offer advice from the position of someone still fairly new to this so don't take what I say as the final word, there's plenty of people on here who can offer far better advice and you should take advantage of it. Whatever you choose, I hope you continue with your recovery and wish you the very best of luck in whatever comes your way.
Tommy