The program file is an executable JAR, so you need a JAVA runtime environment (JRE version 1.6 or higher) to run it. Download it from SUN's homepage. With the JRE installed, the program can be launched by double-clicking the JAR-file.
The program is embedded below as a JAVA applet but has not been working yet (Firefox or Safari). Internet Explorer compatibility has not been tested. Note that the applet also requires JAVA version 1.6. Please send any comments or questions to this address.