How to start non-KDE app at startup?

Hi, I have recently installed SuSE 9.1 Professional, and am trying to figure out how to start non-KDE applications such as xscreensaver (or perhaps Mozilla) automatically at KDE startup time. In the past I have been able to run apps from .Xclients in my home directory, but SuSE does not appear to use this file. Can someone help me with this? Thanks for your help! -Cris