Scene.dat tweak file.
http://files.filefront.com/scene+dat.../fileinfo.html
Here's the one I compiled for Leovampire last year. Mav87th actually made the extra horizon line, with RobieRob's water fog.
That said Redwine, you should follow Luke's advice and get some practice with S3D. Once you have got a handle on it, you will never use mini-tweak files again