The Zip-File includes 2 Blend Files and 2 Example Textures. Just follow the instructions inside of the blendfiles. to get the same Result as on the Preview open the "angular2bge.blend" and Follow Instructions to Step 3. For Fake Reflection Select the Monkey, go to the Texture Settings of the Monkey and load the "AngularMap.jpg" image. For a Real Reflection just Enable "Mirror" in the Material Settings of the Monkey. For a Large Collection of CC0 (zero) Sphere and Angular Maps you should check out this Forum Thread (the attatched examples are also from there): http://blenderartists.org/forum/showthread.php?24038-Free-high-res-skymaps-%28Massive-07-update!%29 I prepaired everything as much easy as i could. I hope it helps you and have fun with it.
This is really good! Great for things like glass cups sitting on a bench over the ocean. Great stuff :)