KDE and shutdown script

Hi I am running SUSE 9.3 on a notebook. I want to run a user script when KDE goes down - where do I have to place such scripts? I heard that you can put any shutdown scripts into the directory ~/.kde/shutdown but nothing happens. I realized that the environment variable KDEDIRS is not set. Does anybody know how I can run a script if KDE goes down? -- Thanks for any help. Sami