I wouldn't throw your toys around too much, there are only so many ways they can ask the same questions. The aim is to get a feel for the type of person you are and whether you match their model.
Even if their 'question bank' is modified, as long as you have some examples of situations where your steely-eyed heroism saved the day, that you can mould to the specifics of the question and verbalise without stumbling and stuttering, you'll be fine.