what mod can do this...

[apakottur]

It's a gray background which you can put your combat log, chat box, action bars etc. in to. Probably hard to understand so here is a screenshots (notice the red arrows :)

http://www.simnet.is/krja/myndir/wow_ui2.jpg

[JaedxRapture]

Well either I'm going insane, or this board got a roll-back.

Anyway, as I posted earlier, try eePanels (http://files.wowace.com/eePanels/eePanels.zip) (with some custom textures).