Don't know if it will work with a USB numpad, but there's a freeware program called Sharpkeys that I use on my laptop to make the Capslock key into a Windows key. It might do what you're looking for.
January 13, 2011 Add as a preferred source on Google Add as a preferred source on Google ASCII characters are part of the US-ASCII code, which is the numerical representation of a character such as 'a ...
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