Text and Images on Category page below Posts

Thanks for the great theme!

Is there a simple way to add text and images below the posts on an individual category page? Each category page needs it’s own text and images.

I would like for my category landing page to keep the gray Category Description at the top, then show the posts below that, then show resource links below the posts.

I haven’t found a good plugin just yet. Maybe there is some coding I can add to the User CSS field?

Thanks for the help!
-David