title: How to NOT require registration during checkout in Magento?
body: <p>I am developing my first Magento site for a client who does not want customers to HAVE
  to register / sign in during checkout. How do I make that optional?</p>
  
  <p>BTW using Magento v. 1.7.0.2</p>
  
  <p>Many thanks,</p>
  
  <p>Cynthia</p>