cognac, I am so sorry for your pain.
Bluecanary is correct: most abusers will not acknowledge the abuse and will try mind games on you. The personality disorders (them, not you) is all too common, which is why they abuse children with such abandon. Narcissism is a good thing to read up on.
Reading from a script like that is a good idea. At least you can keep on point and when they try to interrupt of dissuade you, you will not lose your train of thought. I honestly don't know if you'll get closure or healing, but, getting to finally say *it* to them will at least make you feel so much better.
PS: I told my mom about the things (severe abuse-verbal and physical and emotional) she did and said to me and my sister. I got a JW lecture and was told it was because children need to be handled severely so they will get Jehovahs spirit and we deserved it. Believe me when I say that sometimes true closure is never found unless you totally cut them off and get therapy. (I probably should-get therapy)