Adding article thumbnails to excerpts

I do not want to add the same or random thumbnails to the home excerpts page. I want to add the thumbnail of each JPG in the article to the excerpt of that article.

I did this once last week using something or other, but now it seems no matter what plugin I use, the thumbnails of all excerpts are from the first full article.

Which is the correct plugin that will automatically create a thumbnail of the graphic in an article and put it in it’s own excerpt?
Please.
Thanx
Kicker