I configured a custom Hyper key from this article by Steve Losh.
With my job computer, it's working. With my home computer, it's not working… I have a F19 key on my keyboard, so the event handler of KeyRemap4MacBook tells me that my computer knows the key is not really pressed.
So… I’m looking for another keycode I could use with my Apple Keyboard with Numeric Keypad. Any clue…?