Hello,

Here is how to turn off the "Natural" scrolling in Mac OSX Lion:

1) Go to System Preferences.

2) Choose Mouse or Trackpad icon depending on what you're using.

3) Make sure you're in the "Point & Click" tab.

4) uncheck "Scroll direction: natural"

That's it! now you can scroll just you used to in snow leopard

Here is the video version: