Display Dynamic image instead of icon

[CPDesigns1]

Hello,
I have a forum where users display images in the initial post of a thread.
I would like to display the first image from the first post beside the thread topic instead of the standard 16x18 icon. Of course the image would need to be enlarged to be viewable. Is there a mod out there to do this?

In the example below I'd be getting rid of the paper icon with the green arrow and replacing it with the image.

Thanks!