How to get unlimited renegade points in Mass Effect on Xbox 360

Mass Effect is one of the most engaging movies I've played in recent memory - unbelievably rich universe with very satisfying character choices to be made. Unfortunately, I'm too much of a pussy to really commit to being good or evil. But it's good to know that if I were to choose to be evil, I could be as evil as evil gets.

My roommate David recently embarked on a quest to go through Mass Effect doing only the most "renegade" of possible things, and just figured out how to fill up his Renegade bar at LEVEL 13.