I may have not interpreted your questions, as english isn’t my first tongue. If you consider that I haven’t reply to all questions, please accept my sincere apologies.
If you want to know the “sources”, from a scientist perspective, I can propose books that are pretty popular in the transhumanist “world”, such as " Transcend: Nine Steps to Living Well Forever “The singularity is near” and “How to create a Brain”, by Kurzweil . “Ending Aging” by De Grey is pretty good too. Once again, this are books from inventors, that make pronostics on the future. No one is sure of when, it will able exactly. You can make the gamble, or not.
I personnaly found the idea interresting, from a purely materialistic point of view, and I think that using the back up of occultism could be a very usefull addition to this work, as mathematician tend sometimes to dismiss conscience and it’s importance.
To answer this second half of your text, using this technique can’t be considered “safe”, it can be considered experimental. Feels free to try, or not. For now, the only thing we are sured of , is that bodies frozen in societies like KryoRus have the best conservation that any human body ever could benefitt from since probably the begining of human history. Transhumanist scientist hopes to one day be able to bring them back to life.
Will they succeed ? I don’t know. Am I ready to try my chance ? Hell, yes .
What I am proposing to others in this chapter, is to explore this possibility, and to bring into the game something that most transhumanist consider : occultism. I propose to use principles very similar to posession, to be able to re-integrate this vessel. The ritual I constructed for it, is based on another ritual, supposed to allow you a conscient reincarnation. This time, I propose to not focus on the foetus as your next vessel, but on the physical envellope waiting for resurection.
It may work, or it may be a failure.
I may need to add that I suggest to people to not use this as one possibility, but not there “only” possibility. But in my opinion, the option was worth mentionning.