hey DMAN98,
I did the edutest exam for Nossal 2 years ago (for the year 10 intake) and got in.
For the analytical essay, we were only given a prompt and in my case it was "Technology has had a massive impact on our lives" or something along those lines. I guess they would be just asking you to analyse the statement from your point of view.
Well for the creative part, we were given a picture and had to make up something creative. I was given a picture of a torch and made a story that I remember reading a long time ago.
Personally, I wasn't prepared for the writing aspects of the exam either and only did 1 or 2 prompts for each of those a few days before the test. But somehow, I think I did fairly well. According to my teachers, the most crucial thing is to express and present your material in a coherent and understandable manner.
and yeahhh... that's it from me
if you have any questions, you can PM me anytime
Good Luck (not that you'll need it)