Adding the new smart app banner for IOS 6 to your website it`s very easy.
Add this line in your <head> content on your website, and replace YOUR_APP_ID with your app id.
<meta name="apple-itunes-app" content="app-id=YOUR_APP_ID">
If you have a TradeDoubler Affiliate Account you can add this instead:
<meta name="apple-itunes-app" content="app-id=YOUR_APP_ID, affiliate-data=partnerId=2003&tduid=TRADEDOUBLER_SITEID">