Let's move that to a different thread, shall we, this is about how we'd make it better.
Hands down downplay the romance, but turn up some bromances in there (Not the homo kind, two dudes who just kick ass together.) - say Jacob and Edwardo (He's hispanic now!) figure out that the only way to do anything and be in a goodish plot is to team up and kill that evil vampire chick, but instead Jacob goes psycho and rapes her. Bella is an emo kid, like in the real thing, but actually acts like a real emo kid, the kind you can pity. After witnessing the rape she turns all badass and un-emo and kills Jacob with an antique silver butter knife. And that's all just in the first book.
Book II: Play up the animosity between the werewolves and the vampires -due to the fact that a vampire's sextoy killed their leader - and have a brutal fucking battle that lasts at least 12 chapters, of and on. In an attempt to turn the tide, Edwardo and Allicia (another name change, woot) conduct a ceremony where they infect Bella with their desease. Only it goes terribly wrong and she turns into some shebitch from hell and starts raising hordes of the undead.
Book III: Durring the aftermath of the Vamp/Werewolf war, they band together and attempt to stop Bella's cool new shebitch zombie powers. In the end, only the humans prevail through true ingenuity and a really big Gatling gun.