title: How can i add Three20 to my project using Xcode 4.2
body: <p>I want to add Three20 to my project in Xcode 4.2 and it gives me these warnings:</p>
  
  <p><img src="https://i.stack.imgur.com/LGxGp.png" alt="enter image description here">  </p>
  
  <p><img src="https://i.stack.imgur.com/8tCip.png" alt="enter image description here"></p>
  
  <p>Is there anyone who has a tutorial to add Three20 to the project using Xcode 4.2</p>