I'm not sure about remapping the hardware keys.
On my 770 I remapped keys on my BT mini keyboard to provide special keys using xmodmap and xev. These files came from debian linux arm. This is only possible using the 2005OS since the 2006 stuff is not binary compatible anymore.
It is possible that someone will eventually compile what is needed for the 2006OS, but I'm not going there to wait for it.