Put this code right before you run you first scene ( Assuming that you have “Default.png” file ):

// prevent flicker
Sprite *sprite = [[Sprite spriteWithFile:@"Default.png"] retain];
sprite.anchorPoint = CGPointZero;
[sprite draw];
[[[Director sharedDirector] openGLView] swapBuffers];
[sprite release];

// Run the intro Scene
[[Director sharedDirector] runWithScene: introScene];