Hi Sven &  Jen -

(1) Names are a bit tricky. If you want contact with your Grandfather, I'd suggest that you personally undergo a regression with a competent guide.  Try IARRT.org t find a certified competent regression worker.

(2)  Others are better at this than I and will give a better answer.

(3)  All the ways to enlightenment are the same when you get to the actual level of application.  The names of the processes differ, depending on language etc, but the methods are otherwise essentially identical.  If you like Buddhism or Vedanta, they have some of the best descriptions of methods of meditation etc. However, the actual techniques will be the same no matter where you get them.

Meditation on The Cosmic Sound Current brought to the West by Sant Kirpal Singh (and others) is often available from enlightened teachers in  all parts of the world (and can be found in the Upanishads) and is quite simple.

(4)   Just as you arose from "nothingness" in the very beginning, the fact that there is always more "nothingness" to fall back on means that you'll always be able to restart yourself if you really get in trouble. You can't just "come to an end". The rest of us simply reincarnate from where we leave off in this life, as will you, under any but the most extraordinary circumstances.

If you are already good at meditation, you might try going after your Grandfather yourself. Bruce's books are pretty clear as to how to do it, including his "home study course".

Welcome to the forum; hope to hear more about your success.

dave