A really really simple Wallpaper and a nice (IMHO) color-scheme.
Extract the tar-file and start install.sh as root (sorry, will make a better installation next time).
It will copy the two other files to $KDEDIR/share/wallpapers and $KDEDIR/share/apps/kdisplay/color-schemes.
I recommend you use the .NET-style and QNiX-window-decorations. They look great together.