Dell CPxJ-650

Hello. Since my german knowledge is very restricted, I'm writing in english. I'm running SuSE Linux 9.1 (=> kernel 2.6.4-54.5-default) on my laptop (which is as the topic a Dell Latitude CPxJ 650). This laptop has a couple of special-keys which I would like to use: 1. Fn+PgUp/PgDown for volume controll 2. Fn+End for volume (un-)mute 3. Fn+D turn off monitor 4. Fn+H turn off harddisk 5. Fn+F8 switch screen (external monitor) Is there anyone that can give me any hint about where to begin, in order to get these buttons to have a function? Bjørn Ove Johnsen PS. I will be able to read answers in german, but for the readability not writing it myself...