DON'T SEND THE LETTER. It's way too long, you're trying to "teach" her, and I don't think it will accomplish what you're trying to accomplish (btw, what ARE you trying to accomplish?).
I'm slammed at work at the moment and don't have the time to go thru it point-by-point, but I simply HATED it -- made me cringe.
Maybe Allen and the others will have a different take. Your call, of course, as always.