I am using your plugin and it is very good plugin. I used it in my lot of project. Now I would like to be able to have a thumbnail picture to be displayed with the RSS post content that is outputted. Ideally, the thumbnail would come from an uploaded image from the post or from the featured image upload. Can I do it within your plugin and how to get the image? Can you give me some guide or some code for this? I will be very glad if you help me about this problem.