Thanks Eric and wp2theme for the help!
Eric, I read the threads but unfortunately I am not that good with code. For example I have no idea where I can find the theme directory and the posts_loop_template.php. Anyway, thanks a lot for your help, I appreciate it!
Wp2Theme, thanks, your shortcode works! It does show images now. One more thing: when I set it up as full=false, the images are left aligned, but when it’s set up like full=true, the images are not left aligned but on top of the text. Is there a way it can be set up as full=true and still have the images left aligned?