AVP was on the Late 1980s, it was novelized in '90s.
1. For the Alien 3: go to
Horrorlair.com2.The Chigusa Corp. acts alot like Weyland-Yutani, the probably bought the colonists' silence through bribery, threats, extortion and most definitely murder. The Marines were mostly likely sent in as a dummy recon for: Capture the Aliens, to see if any hostile lifeforms were left to stand in way of construction of a new Prospirty Wells, or a company official was on the team and they were sent to record combat data of the Aliens against Marines, seeing as how Bishop and the Sulaco data was never sufficently recieved.
3. I recall he admitted to Gene Therapy/Genetic Manipulation/Cross-Genetic Splicing. Either way he altered his body chemistry and added Queen DNA and most likely Queen RNA to his own genetic structre and biological/ physiological chemistry/makeup.