title: Inno Setup custom welcome page
body: <p>How can I customize the welcome page of an Inno Setup installer?</p>
  
  <p>I want to create an installer similar to Skype's installer with only 3 pages:</p>
  
  <ol>
  <li>Custom Welcome Page with some options</li>
  <li>Progress Page</li>
  <li>Finish Page with "Run Program" option</li>
  </ol>
  
  <p>But all the code samples I've seen only allow customizing the wizard <em>after</em> the welcome page.</p>
  
  <p>Apparently Skype uses Inno Setup, so I know this is possible. But how?</p>