Show image thumbs in backend

Hi,
How can I show a thumbnail of a catalog item in the backend listing? Right now I'm using this code to display the title and an image.

Code:

---

{{title}}

{{image::w=60&h=60}}

---

The thumbnail will work only if the image field is a single file field. If the image field supports multiple files, the thumbnail will not work. Is there a way to show a (or all) thumbnail if the image field supports multiple fields?