Sigh* The queen didn't just 'come about' in aliens. I really can't be bothered to go in depth on this, i think soon i'll try and write a piece for this site covering the how's and whys of alien biology. Alot of you really need to get in the now about this.
There were no aliens on board the jockeys craft. They were carrying a cargo of alien eggs to an unknown destination when they hit a meteor storm which ruptured the hull of the ship and destroyed the fail safe system containing the eggs, without restraint, the eggs hatched and began to empregnate the crew, with one last ditch attempt to keep the aliens from spreading, the last jockey on board (yes the one in the chiar) sent out a distress/warning signal as he piloted the ship to crash land on the nearest planet (archeron) just as he too fell prey to the aliens.
This is a widley ACCEPTED theory on how the craft came to be on acheron.
www.thorndesigns.netdarkness of acheron