Hello Shernon!
Best bet for you is to speak to a Migration Agent direct. They know all the ins and outs, particularly where a Skilled Migrant visa is not an option.....
Send a private post to Alan Collett. Search 'members list' on your tool bar above, under 'A' and then somewhere near the bottom there will be an option to 'send a private message'. He's very helpful and posts on this site regularly. No-one on here would be able to tell you precisely what route to take, I don't think, we do know lots, but the Migration Rules and Regs are notoriously lengthy and complex.
Best of luck to you,
Cheers,
Rachel

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Big Stu, Little Rache,
Accepted to study in Melbourne, July 2008.
Confirmation of Enrolment received 26.4.07.
Police Checks requested 06.12.07