Environment maps are relatively easy to use and don't really require tutorials unless you are trying to make your own maps.
Have you looked at the
Manual?
A couple of notes...
1. Depending on your graphics card, you may or may not be able to view environment maps in the workspace but you will always be able to see them when rendered in the scanline or ART renderers.
2. You can set a single texture as an environment so long as it's loaded beforehand (load the image using diffuse, ambient, spec slots).
If that doesn't help then please explain further what you're having trouble with. I couldn't find any tutorials on the spot but you can always search this forum and the old original forum for helpful articles.