There is the claim that God dictated the Torah to Moses, something that I am willing to consider. But as for the rest?
The concept fills out even further in the New Testament with the Gospel of John referring to Christ as Logos - pre-exsting and causitive of the creation of which we are part.
John 1 is pretty explicit in explaining that the Word is actually Jesus Christ Himself, not the written word.
In short, the Word of God did not need a process to get to the pages of your Bible. They are one in the same, and pre-existed our limited temporal perception of them.
With the knowledge that we have of the changes in the various NT books, with the knowledge that we have of the selection of Scripture by the Church, with the knowledge of the various faulty (sometimes deliberately faulty) translations, we have to focus back in the idea that Jesus is the Word; scripture is the word.