Well I am facing 2 issues which are similar I guess.
I think it has something to do with ClippingNode but I would appreciate if someone could give me an example.
I think you can use CCSprite::setTextureRect(CCRect).
Can you explain what values will go in CCRect parameter? e.g. the size of the sprite is 480x800. So if enter this value CCRect(0,0,480,600), it will remove 200px from the top? And will the position of the sprite change?
Best way to learn is to try it yourself.