Get help.
It was all the ancient Hebrews could do to keep the text correct even with hundreds of men who dedicated their lives to memorizing it.
There's a little break in the chain of custody reflected in Kings II 22 that has to be accounted for.
You should be up on this particular controversy ~
http://www.christianlibrary.org/authors/John_L_Kachelman_Jr/people-ot/hilkiah.htm has a nice writeup you should check out.