Suppose that you want build the EJB-APP "MYAPP.EAR"
packed in MYAPP.jar which needs MYLIB.jar.

To obtain a functional EAR you must build this
structure:

MYAPP.EAR
|
|-> META-INF/
|........|-> APPLICATION.XML
|........|-> MANIFEST.MF
|
|-> MYAPP.jar
|........|-> META-INF/
|............|-> APPLICATION.XML
|............|-> MANIFEST.MF
|
|-> MYLIB.jar


The reference to MYLIB.JAR must be put in
MYAPP.EAR/MYAPP.JAR/META-INF/MANIFEST.MF
as this sample:

------- MYAPP.EAR/MYAPP.JAR/META-INF/MANIFEST.MF ----
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.1
Created-By: 1.4.2_06-b03 (Sun Microsystems Inc.)
Class-Path: MYLIB.jar
-----------------------------------------------------