It's the message of Christ that saves people--the Word of Faith--Christ Himself. The preaching of Christ would have still gone on--HE CAME TO THE EARTH AND PEOPLE PREACHED ABOUT IT--and the Spirit of God would still keep regenerating folks for thousands of years. Think about it. It's the Gospel of Christ that saves--and He handed it off to people to TELL others, so others would tell about Him, so others would tell about HIM.
In other words, even if we did not have the Scriptures, the Message of Christ could still be proliferated because Christ visited humanity and His life and death and resurrection could still be communicated--which is enough to save someone.
@Iconoclast, you are pitting Scriptures against Christ himself. I'd probably back down from this one, friend.