Dear Rahul,
I am also a CA final yr student and i m going to appear in Nov 2008.
For u, the simple fact that, why are you assuming that you will not clear in your first attemp. DONT DO THAT.
Believe in urself, trust me, u will defenitely clear in that attempt. So there will be no confusion regarding if i would not clear in my first attempt then i have to switch over to new scheme, so why not to start from now itself....!!
This should not be done dear.
And there is still so much time for ur attempt. Study well
In short, continue with old scheme.