First install the Nvidia or ATI driver by clicking one of these links. It will open up YaST and install the driver for you.
After its installed restart X and then log in. Then open up the Terminal and type
su. Then type your root password and run the following commands:
nvidia-xconfig --composite
nvidia-xconfig --allow-glx-with-composite
nvidia-xconfig --render-accel
nvidia-xconfig --add-argb-glx-visuals
Once you're done close the Terminal and restart X. If you're using KDE there should now be shadows under various items (If you're using GNOME it wont show the shadows).
Then click this link:
It will open up YaST and install Compiz Fusion through Git.
Once its finished installing restart X (Ctrl + Alt + Backspace) and then log in. Compiz Fusion should now be running.
Note: If there is no window decorations open up the Terminal and type the following command. It will ask you for your root password so type it.
sudo nvidia-xconfig --add-argb-glx-visuals -d 24
Then restart X and log in.
That should fix the window decoration.