Thanks!
John
Method #1:
$ rm -r $KDEHOME/share/apps/ksplash/
This should replace the splash with the default one at next KDE startup.
Method #2:
Head to kde-look.org, and search for a program called ksplashmanager.
This program allows you to easily switch splash screens and activate new
ones you downloaded from somewhere. It does nothing else but overwrite
the files in $KDEHOME/share/apps/ksplash/ with the files from its theme
collection. As far as I know, it's easy and safe.
Good luck!
Andreas Steffen