i would like to know this as well.. can you style within curly brackets? ive tried surrounding it with a div..
this helped me resize my random image in randome_image.html, but uses original file not the generated thumbnail
<a href="{image_url}"> <img src="{media_src}" border="0" alt="{image_name}" style="max-width: 200px; width: expression(this.width > 200 ? 200: true);"></a>