...
If you want to use JDK 5, don't download JBoss for JDK 6 (jboss-4.2.3.GA-jdk6.zip) - use jboss-4.2.3.GA.zip!
_dcm4chee requires Java Development Kit (JDK) and not just the Java Runtime Environment (JRE).
3. Copy files from JBoss to dcm4chee:
...
The dcm4chee startup/shutdown scripts depend on the JAVA_HOME environment variable in order to find the Java executables and libraries. For example, if your JDK is installed at "C:\Program Files\Java\jdk1.5.0_22" then that is the path to JAVA_HOME
If you're not sure what an environment variable is, check with your IT staff or review this wikipedia page and/or consult the documentation for your operating system.
...