To clear things out regarding PFC:
http://jeffrowland.com/knowledgemanager/questions.php?questionid=144
http://jeffrowland.com/knowledgemanager/questions.php?questionid=180
http://jeffrowland.com/knowledgemanager/questions.php?questionid=144
http://jeffrowland.com/knowledgemanager/questions.php?questionid=180