Hi Greebo,
Having worked with Aussie Water pythons before in the UK, I thought they were all physco's, until I came out here and was pleasently surprised to find a few with normal, calm demeaner's.
What I tend to do with snakes that you describe is place them in a very large viv, and place plenty of large hides for them, also cover the front of the viv with black paper or card, and gradually remove the paper, so you can see a little more of the viv each time, over say two weeks.
After they have settled in for a few weeks I would get them out with thick gloves on and handle for 5-10 mins, lettting them bite the glove as much as they can, then if they are calming down , some weeks later I would take one glove off, and keep one on, you get my drift, until, the snake is fully tame.
I always remove the snake from the viv first with a hook.
Also place the snake in a large viv away from high traffic area's, where it will become more stressed.
Most snakes will calm down given time and patience, but you will always get the odd one that seems to have a hard time accepting that they shouldn't bite the hand that feeds them.
Good luck with her.
Neil