this is how to use Xscreensaver in KDE
it is easy
1: Switch off KDE's screen saver.
Open the ``Control Center'' and select the ``Look and Feel / Screensaver'' page. Turn off the ``Enable Screensaver'' checkbox.
2: Find your Autostart directory.
Open the ``Look and Feel / Desktop / Paths'' page, and see what your ``Autostart'' directory is set to: it will probably be ~/.kde3/Autostart/ or something similar.
3: Make xscreensaver be an Autostart program.
Create a file in your autostart directory called xscreensaver.desktop that contains the following five lines:
Now use xscreensaver normally, controlling it via the usual xscreensaver-demo (1) and xscreensaver-command (1) mechanisms.