title: OpenX: Add custom fields for image banners (e.g. background color)
body: <p>What is the easiest way to add custom fields for image banners without creating a separate plugin for a new banner type?</p>
  
  <p>If plugin is the only option — where can i find info about how to do it? </p>
  
  <p>(I am studying the OpenX video plugin but it includes a plethora of features that i don't need, thus making it rather complex.)</p>