$Ground::topTexture Add-Ons/Ground_SMBdirt/dirt.png$Ground::scrollSpeed 0 0$Ground::loopsPerUnit .5$Ground::Color 1.0 1.0 1.0 1.0$Ground::ColorMultiply 0
Just look at others that people have made. It's really easy to figure out.
http://forum.blockland.us/index.php?topic=204914.0
Found the problem. The .ground file needs to be named dirt.ground. Not dirtground.ground.