• Navigate to the Arduino download site: http://arduino.cc/en/Main/Software
• Download Arduino for your platform.
• Unzip the file to the directory of your choice. (We will refer to whatever directory you choose as <arduino_dir>). I use c:\arduino\ on Windows or /home/justin/arduino/ on Linux so that (for arduino 22 for instance) the path extracted executable is c:\arduino\arduino-0022\arduino.exe on Windows or /home/justin/arduino/arduino-0022/arduino on Linux.

• Download the latest ClockTHREE library source code file from here: http://code.google.com/p/clockthree/downloads/list
• Unzip the library source code file in your home directory. I use "My Documents\sketechbook\" on windows and /home/justin/sketchbook/ on linux. We will refer to the directory you choose as <sketchbook>.

• Start arduino (look here if you have trouble with this step)
• Click File->Preferences to pull up the preferences menu.
• Leave "Use external editor" unchecked if you plan on using Arduino as your editor.
• Click the "Browse" button and navigate to your <sketchbook> directory from step 2.
• Click "OK".
• Close and restart Arduino
• Click "File->Sketchbook->libraries". If "ClockTHREE" is listed you've done well.

• On or about line 55 in the file <sketchbook>/libraries/ClockTHREE/ClockTHREE.h, uncomment (for ClockTHREEJr) or comment out (for ClockTHREE) the following line.

#define CLOCKTHREEJR // uncomment this line for ClockTHREEjr

• On or about line 32 of <sketchbook>/libraries/ClockTHREE/examples/ClockTHREE_02.pde, comment out all but one of the following lines depending on language and hardware.

// #include "english.h" // only need one language at a time
// #include "german.h"
#include "english_jr.h"
// #include "german_jr.h"

• On or about line 292 of <sketchbook>/libraries/ClockTHREE/examples/ClockTHREE_02.pde, comment out all but one of the following lines depending on language and hardware.

// English faceplate = English();      // Only need one at a time
// German faceplate = German();      
EnglishJr faceplate = EnglishJr();
// GermanJr faceplate = GermanJr();