How to map right windows key to backspace?

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http://askubuntu.com – BackSpace key is out of range of my right hand, and everytime I work with text editor in such conditions where I need a backspace key stroke, it makes me look at my keyboard, and so disturbs my rhythm of typing. I hardly use my Right Windows key. I want to map it to perform as backspace key. (I have a US standard layout keyboard.) (HowTos)