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OpenGL Normal Mapping Lightwave OBJ Models

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I have a few questions about OBJ files and normal mapping:1) Is it possible to export OBJ files with normal maps associated with materials? I've seen support for bump maps, but that's different.
2) Has anyone found any OBJ files with normal mapping applied to them? I tried making my own normal-mapped models to test them, but no luck with that.
3) Binormals are perpendicular to the vertex normal, and run alone the triangle's V texture coordinate, correct? Tangents run across the U texture coordinate?
4) Can anyone point me to a good tutorial about normal mapping with OpenGL? I'd like to stay away from using extensions as this code should be compatible with OpenGL ES 2.0 if possible!

Thanks for reading!

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