My Pro keyboard is dead after spilling water on it...so I am faced with paying $65 for a new one or using my (not so bad) MS Natural Pro keyboard. My question is this: Is it possible to customize keys with OSX, i.e. designate a button for "eject" and "volume," etc? I don't even know how to open my disc drive now, other than a difficult way such as thru iTunes, etc. Please help!