title: Add custom field to order in magento
body: <p>I am new to Magento, All I need is add a custom field to order in back-end, and print that value on the PDF.</p>
  
  <p>I want a save a sales person name with order when orders are added from back-end, and print the sales person name on PDF.</p>
  
  <p>Any Idea? any better module or anything ?</p>