Hi Power Puff,
My school does not have an interview process but I thought that I might mention a few things that would help you.
1) After they ask questions of you, you should ask some questions of them. Even if you have done a ton of research and know everything there possibly is to know about their program you should ask a few questions because this shows them that you have done your research and that you are showing interest in them and the program. Kind of like a job interview
. It's important at the end to ask questions so that they know you are genuinely interested.
2) Go to Monster.com. They have an interactive interview section that I have found very helpful. I don't know if they have a "student section - school interview section" but if you reviewed the interview questions for the Health Care Fields you would probably find it helpful in that it would give you a better idea of how to "word" your responses and how to deal with those tough questions like "name 5 negative things about yourself", etc.
3) When it comes to the other tough questions like "why do you want to be a nurse" and you don't want to go all Florence on them I have always been told that the best response is an honest and sincere one. since you have some time think about why you want to be a nurse and prepare a response, but don't practice it too much, you don't want it to be "canned". Just be honest.
I'm sure you will do fine and good luck!