In order to get around the JBI Lifecycle Classpath limitation in the application server, a new JBI jar file is being created called esb_jbi_framework.jar. This jar file will contain a MANIFEST.MF file that contains Class-Path: entries that point towards the jbi_rt.jar (JBI Runtime) and jbi_tests.jar (Scaffolding Registry et al) . This way we dont have to combine the throwaway jbi_tests.jar with the main jbi_rt.jar later. We would simply have to dereference it from jbi_framework.jar. Likewise adding a new JAR to the same classpath would simply mean adding a new entry to the ClassPath: header field.