The bare minimum needed to run ImageJ on any computer is:

• The java executable javaw.exe: click to get one for Windows -- in unix it would be one called simply java. If it is already on your machine as part of the java run time environment (JRE) or java development kit (JDK) it would most likely be at something like ... /jdk1.3.1/jre/bin/javaw.exe.
  If you downloaded the JRE or JDK from the ImageJ website as part of the ImageJ program package it would be at ... /ImageJ1.30/jdk1.3.1/jre/bin/javaw.exe.

• The main java library tools.jar. If it is already on your machine it would most likely be at ... /jdk1.3.1/lib/tools.jar.

• The main ImageJ library woij.jar. Actually the file directly from the ImageJ website is simply ij.jar. woij.jar is my version with the snake contouring program and other advances.

• To use my plugins you will need to get them and put them into your main ImageJ/plugins directory. Click on each one. The .java files are the source code. The .class files are the compiled versions for my Windows machine running JDK 1.3.1.

  ImageProcessing_.java

  Create_A_Filter_.java

  Create_A_Template_.java

  GradientAnalysis_.java

• To recompile those plugins within ImageJ or create new ones you will need the java compiler javac.exe. If it is already on your machine it would most likely be at ... /jdk1.3.1/bin/javac.exe.

• Finally to actually run ImageJ you a batch file to invoke the java executable with the ImageJ parameters. For Windows the ImageJ guys created a shortcut that is included in the web page download. You will have to edit that shortcut (click on the shortcut icon once, then right mouse button to get to the Properties tab) and change ij.jar to woij.jar, and correct your paths if needed. In unix my version looks like:
  java -cp woij.jar:/usr/home/wodell/ImageJ1.27b/jdk1.3.1/lib/tools.jar:/usr/home/wodell/ImageJ1.27b/plugins: ij.ImageJ

• If you run into problems first try checking out the official ImageJ web site http://rsb.info.nih.gov/ij/