LT,
You are right. All scripture inspired of God is talking about the OT, not the NT. I see what you mean that the RC are the first ones who declared even the NT inspired. Thank you for clearing that up. I was under the impression that the RC was speaking about the OT and the NT. The NT writers never claimed to be under inspiration anyway. They simply wrote thier testimony about Christ and his teachings, and wrote much about thier hope for the future return of Christ, and about their personal experiences living life as a Christian.
I think the only NT book that claims to have been written under inspiration and is a prophetic one (according to some) is Revelation. btw: I am sort of a "reformed" Christian myself. Lilly