Adding Images Belo Main Content?

My friend’s site has some image-linked sponsors in the right column. He has inquired about adding some “Honorable Mentions” in the black space between the white main content box and the footer.

I imagine that would take a little more than some “Additional CSS,” and I feel this probably goes beyond my ability to simply add a block of code.

Would something like this be doable, or should I just tell him no?

Thanks for the help!

The page I need help with: [log in to see the link]