Actually, I would have gone along with the idea that the Jockey's were
alive many thousands of years ago and could see into the future and
could have time capsules placed on various planets, and well they could
see the outcome of their actions through seeing into the future and
through this method they managed to come to make a deal with
Weylan-Yutani to give them bioweapons in payment for assisting with the
continuation of the Jockey's own species in the human's time frame
because the Jockey's species died many thousands of years ago. maybe
almost wiped out in a war against another alien species, and they were
able to realise what was going to happen as a result of something else,
but there is a chance that the jockey's in the past could finally get
another colony of theirs in the human race's timeframe, and then slowly
plan to take over the human's race's planets. But looking at the way
things are going through the series, their plan might not be working so
soon, in terms of hundreds of years.
So the derelict might in a way be a time capsule for me, and the ship's
pilot was secondary in terms of the plot, but his own memories might
have been carried off by the chestburster before it grew up, died and
maybe transformed into a spore or left them behind containing DNA
information from it's "parent" that would in some alien way contain all
it's memories.
So that would have been an idea that I would have merged with another
idea of mine