Do you mean the splash
between login and desktop?
=> KDE Configuration Center: There, you'll find what you're searching for
In the past it was: System Settings >> Look and Feel >> Appearance >> Splash Screen; but it can be changed by now (don't know exactly where it's findable now - don't sit behind a Linux pc at the moment)
Or do you mean the splash
on booting / shutting down=> plymouth boot theme's
You can change them by searching in Synaptic for 'plymouth';
there are different theme's available there, if you install a new one, it's applied at once....
You can switch between them in the Konsole, or with the program 'ezswitch' (in Synaptic)
Examples of them here:
http://www.pclinuxos.com/forum/index.php/topic,76205.0.html(so you can chose one, and don't have to test them all
