(PG: I apologize if I'm completely off here, but the above is my impression of what you've been saying, at least -- if I've misunderstood what you've been saying I hope you'll correct me!)
In any case, the answer is the same: First, make sure that the YC team knows that they'd be idiots to not accept you; and second, if you're not accepted, go ahead with your startup anyway, and make sure that the entire world knows that the YC team were idiots for not accepting you.