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.

MEMPHIS, Tenn. - A man was robbed for his key reprogramming tools in what Memphis Police (MPD) described as a setup. Police said it happened just after 12:30 p.m. Monday. The victim told investigators ...

Jesse Irvin Zelaya. Houston police say they've arrested Zelaya and Michael Arce, accused of using pirated computer software to steal more than 100 vehicles that likely ended up in Mexico. Authorities ...