Just when I was thinking it wouldn't be viable to add brackets to the numpad because of the way keyboards and scan codes work, I spot this image over on TE's website:
http://www.trulyergonomic.com/benefits.html#Numeric-KeypadNote the Num-Lock brackets on front of the square bracket keys. So with Num-Lock on, you push "[" and it sends a scan code which results in "(". Now either he's done something clever, something rubbish, or hasn't got round to programming the controller yet.
Any thoughts?
Cheers