need help programming

hey thank you for reading this. im trying to do this program from a website http://www.circuitsathome.com/mcu/ps3-and-wiimote-game-controllers-on-the-arduino-host-shield-part-3 there is also part 1 and 2. when i try to open some files i get Spi.h is not in directorie can someone please help me find it? thank you very much for your help

File SPI.h should be found in \arduino-0022\libraries\SPI.