Just went to check up "Netcombe" over the net and i couldn't find anything. Am sorry but i still doubt its existence and even if it does exist from what you wrote

The details are complicated and more than a little creepy, but the gist of it is that Netcombe, in zombie-like fashion, needs fresh brains for their technique to work. So, using End of Life Option laws in places like California, they euthanize terminal patients using a special embalming fluid which blocks off the brain from the body while keeping the brain alive, though no longer conscious.

If i read what i just cited well, It doesnt make you fully immortal because a part of you (your body) might be lost.
Reading this post reminds me of a movie which was actually a fiction though, the originals. Immortality was also put into display. Yes they do swap bodies but their former body were always preserved till they came back to them.

Still insist that Jesus christ is the only way to eternal life.