The keys are actually pretty easy to get working, depending on your WM. It's a two-step process.... first, assign a scan code to the key, second, assign an event to the scancode. I use XFCE, and there, it's ridiculously easy to assign an event to a scancode.
Go to Control Panel > Window Manager > Keyboard. Create a new profile, and you can now assign events to keypresses.
I wrote a howto that's XFCE-specific for that part. But assigning the scancodes to keypresses is distro- and wm-independant.