I concur with Elprez too. I much prefer the version from Moore and O'Neill's graphic novel, and that's what I'll try and write up. But I do think Craig's Jekyll/Hyde solution is elegant.
I was most offended by the movie version putting Quatermain in the leadership role when, in the comic, it was Mina Murray who was the leader. A human divorcee who is a SURVIVOR, so strong that she even stares down Hyde and wins his love and loyalty.