Conversion of pioneer avh-x4500dvd to avh-x4500bt version

Hello guys. I know that this information exist on this board, but because of bad find engine I can't find any one theme about this. About coversation dvd car player to Bluetooth. I realize that sounds like "Google it for me guys.", but there's nothing more I can do. I spent an hour, I entered completely different spellings, but I only found official documentation, which is not enough.