It is mainly required to setup JNDI in Tomcat (jdbc/testDS1) and it depends on the transaction manager selected and Tomcat version.
For example, here is the documentation using Bitronix on Tomcat 6.
http://docs.codehaus.org/display/BTM/Tomcat13
If this configured as global resource in Tomcat (i.e, modifying $CATALINA_BASE/conf/server.xml), no changes are required in the jbpm-console.war and gwt-console-server.war. The JNDI will be available globally for all the web applications