arduino duiminalove programming using header and source code files

hey im am trying to integrate a wii remote to an arduino using a host shield using the link http://www.circuitsathome.com/mcu/ps3-and-wiimote-game-controllers-on-the-arduino-host-shield-part-3 now when i look at the codes GitHub - moyuchin/WiiRemote_on_Arduino: Wii Remote, Arduino, USB Host Shield, Circuit at home i don't know how to integrate those header and source files into a arduino duiminalove ATMEGA328

i don't know how to integrate those header and source files into a arduino duiminalove ATMEGA328

Perhaps you might have taken the time and trouble to look at the example provided.