UIModalPresentationFormSheet をリサイズしたい

StackOverFlowにまさにな質問が。
ipad - UIModalPresentationFormSheet resizing view - Stack Overflow
superviewに対してリサイズすればいいみたいです。

MyModalViewController *targetController = [[[MyModalViewController alloc] init] autorelease]; 

targetController.modalPresentationStyle = UIModalPresentationFormSheet;
targetController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; //transition shouldn't matter 
[self presentModalViewController:targetController animated:YES];

targetController.view.superview.frame = CGRectMake(0, 0, 200, 200);//it's important to do this after 

targetController.view.superview.center = self.view.center;