Hey Lukey,
I got in under the early entry scheme for CSU. They call it PREP.
Your school will be given a heap of little pink booklets from CSU.
Go ask your year advisor about it so they know someone wants one ad they should give it to you.
Once you get it, there will be a check-list of what you need to do on the back. My school practically took control of them and stuffed around too much and i think some didn't get sent in the end, so its better if you do what i did and get things done by yourself.
Get you parts filled in, then go to your principal and let them do their part. Make sure you get it back from them and post it yourself. Otherwise they'll say they'll post it along with the others in bulk, the day before.
This may not be the case for you, but my school was pretty dodgy and they stuffed up my scholarship form. There were parts that I had to fill in, but they sent it away without looking an unfinished form.
Moral of the story, trust no-one with anything important!
-phizz