Rumor Control: Breaking Dawn Still Unconfirmed, says screen writer Melissa Rosenberg

Though The Wrap reported yesterday:
With the sequel to the blockbuster hit "New Moon" now filming in Vancouver and its sequel, "Eclipse," already deep in the planning stages, an individual close to the production has told TheWrap that work on the fourth and final in the series, "Breaking Dawn," will start in late spring 2010.

Melissa Rosenburg, the main source and goddess of Twilight script writing, has squelched that theory:
“The most I’ve heard from Summit is ‘re-read it and start thinking about it,’” says Rosenberg, who is completing her show-running duties on the fourth season of the Showtime series Dexter. More telling, she hasn’t yet received one of the manifestos Meyer famously puts together before Rosenberg begins turning one of her books into a movie. Another source is also skeptical that Summit is far along in developing a fourth film. “As far as I know, Stephenie was still having meetings asking, ‘Can we really make this into a movie?’”

I'm having those same questions- HOW can Breaking Dawn be made into a movie?