This interrim build runs on JDK version 1.4.2 and higher. To install this build, chdir to the "jre" directory within the jdk and unjar (or unzip) the jar file. For example, if your JDK is installed in /usr/java/j2sdk1.5.0, you would install this as follows: cd /usr/java/j2sdk1.5.0/jre jar xvf /path-to-downloaded-jar-file.jar You may need to be "root" to do this on Solaris or Linux.