How do I apply an environment map in Blender Internal? I'm using Blender Internal due to its object outline effect, and am trying to use a 1800 degree environment map for the reflections (not lighting). I'm trying what seems like should work, and am failing. 

Most of the tutorials for this are in Cycles, which is handled easily, can anyone tell me how to do it in Blender 2.6+ Internal?

EDITS: 

So my question is really just "How do I apply an environment map in Blender Internal?"; the perspective of the environment map is trivial to the question.
Enable Real Sky in Properties > World to make the sky render relative to the horizon rather than the camera:



Optionally enable Environment lighting to use the sky texture to illuminate the scene.
Switch to the texture panel and create a new world texture by clicking new with the World tab selected:


Set the type to Image or Movie and open an image:


In Textures > Mapping set the projection to Equirectangular and enable Horizon in Textures > Influence:




Result: