procyon avrlib

Is it possible to use the procyon avrlib? http://hubbard.engr.scu.edu/avr/avrlib/docs/html/index.html It is mentioned here: http://www.arduino.cc/en/Main/Documentation

One way is to copy all the header files and .c or .cpp files that you need into the directory of your Arduino sketch. Then #include the header files from your main sketch file. Everything should automatically get linked together and uploaded to the board.

Is it that easy? I am going to try it.