To install just cp -R * ~/.kde/share/apps/kicker/. or copy to wherever you keep your kde config stuff.
To use these images open Control Center to LookNFeel --> Panel --> Look & Feel. Set background image to ~/.kde/share/apps/kicker/wallpapers/keramik_kicker.png. Then enable background tiles and select keramik_start for K-Menu, keramik_big_button_middle for Application Launcher. Now you need to select keramik_big_button_left background tile for an icon from the Desktop Access, Legacy, Quickbrowser, or Window List classes. Place that icon just to the right of K-Menu. Do something similar for keramik_big_button_right and place that as your rightmost icon.