Using skybox cubemap in Blender

I have six cubemap faces of a skybox texture that I would like to use in Blender. I just don’t know how. Search engines ultimately show me instructions on how to create these maps for games, not how to use them in Blender.
Should I build a cube and assign the textures to the faces, and invert the normals? Or is there some other sky setting I can use?

I’m using Blender 2.77a and Blender Render.

Thanks in advance for any advice!