News Box Manager CSS Problem

[Phid]

Actually, I now have a different CSS problem with the News Box Manager. Through CSS there is only a way to control the header and the entire box, not the box with the content only (below the header). I want to put a border around the content, but not the entire box. See below as to how it appears now. Developer's Toolkit is not helping me at all as I cannot find which file I need to edit to gain control over the content box alone, rather than the entire container box.