This is also based on another wallpaper with the same name:
Way 1: You may download KSplashManager to easily manage and install any splash screen on kde-look.org:
Compile KSplashManager by doing:
$ tar zxvf ksplashmanager-0.9.1b.tar.gz
$ cd ksplashmanager.b
Password: (enter root password)
# make install
Then you can execute it going to the K menu, selecting "Run command..." and entering "/usr/local/kde/bin/ksplashmanager" (you may copy and paste but without the quotes).
Way 2: Uncompress the splash-screen .tar.gz and copy the files contained inside it to the directory ~/.kde/share/apps/ksplash/pics . If the directory doesn't exist, just create it.