NSArray *images = [NSArray arrayWithObjects:@"bear_2x2.jpg", @"bird.jpg", @"cat.jpg", @"dog.jpg", @"turtle.jpg", @"ooze_2x2.jpg", nil];
for(int i = 0; i < images.count; ++i) {
    NSString *image = [images objectAtIndex:i];
    float offsetFraction = ((float)(i+1))/(images.count+1);
    CGPoint spriteOffset = ccp(winSize.width*offsetFraction, winSize.height/2);
    CCSprite *sprite = [CCSprite spriteWithSpriteFrameName:image];
    sprite.position = spriteOffset;
    [spritesBgNode addChild:sprite];
}

[CCTexture2D setDefaultAlphaPixelFormat:kCCTexture2DPixelFormat_Default];