iBook power button calls shutdown/restart dialog

[James Dunn <james@4thharmonic.com>]

Hi,

I would like my iBook power button to call the shut down / restart 
dialog within gnome when it is pressed.. Can someone tell me how to do 
this? I've searched all over the internet to no avail. The keycode is 
222, according to xev. Do I need to use something like xmodmap..?

thanks

James