Out of these three directories, which jar files are for:
-JBoss itself
-dedicated for Client java program (EJB) access
-dedicated for java server program access?
C:\Program Files\jboss-5.1.0.GA\lib
C:\Program Files\jboss-5.1.0.GA\common\lib
C:\Program Files\jboss-5.1.0.GA\common\lib
?
lib is for bootstrapping the app server
common/lib is for running the app server
client is for standalone client apps