Wanted: After Effects Script

I have had a great time looking at aescripts.com and maybe with some guidance I can find what I am looking for.

I am looking for a script (or combination of scripts) to take the composition I have, go to the first frame of a clip, export a jpeg or add it to the render queue as a still, then go to the next clip and repeat. This will give me a sort of storyboard of the clips in my timeline.