1) No it should still post to Form2Mail.php. Instead of copying the php code that goes at the top of the page into the page with the form on it, it needs to be copied to the Form2Mail.php page, the forms action page.
2) yes, as long as the code is in the correct place.
3) I see, in step 7, you should highlight lines 6 - 13, instead of 6 - 12, got it. I'll pass that along.