How did the creators of the Spotify website make that awesome scrolling animation?
http://www.spotify.com/uk/
http://cf.scdn.co/js/parallaxScroller.js
seems to be a custom script but I found several similar scripts like this one http://www.inserthtml.com/2011/08/jquery-parallax-scroll/
This is the trick what makes a developer different from others ;)
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Just view source of the provided website it shows https://d2c87l0yth4zbw.cloudfront.net/js/parallaxScroller.js
You need to do little bit google, surely you will get required script for such type of scroller.