How to add PostgreSQL JDBC driver to JBoss as core module?

1.   Check the support version of the PostgreSQL JDBC driver that is supported with JBoss version that you are using in "JBoss Enterprise Application Platform (EAP) 6 Supported Configurations"

For example, JBoss 6.2 is supported with PostgreSQL 9.2 JDBC4 Postgresql Driver.

2.   Download the PostgreSQL JDBC Driver from PostgreSQL JDBC Drivers download page.

3.  Place the download jar file postgresql-9.2-1004.jdbc4.jar under

     $EAP_HOME/modules/org/postgresql/main/

4.   Create XML file $EAP_HOME/modules/org/postgresql/main/module.xml with the following content:

<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.1" name="org.postgresql">
   <resources>
     <resource-root path="postgresql-9.2-1004.jdbc4.jar"/>
   </resources>
   <dependencies>
     <module name="javax.api"/>
     <module name="javax.transaction.api"/>
   </dependencies>
</module>

5.   Restart JBoss domain/standalone servers to get the new module loaded using:

     # service jboss-as-domain.sh restart

6. Start the jboss-cli in connected mode:

     $EAP_HOME/bin/jboss-cli.sh --connect

7.   Execute the below command in CLI:

     /profile=full/subsystem=datasources/jdbc-driver=postgresql:add(driver-name=postgresql,driver-module-name=org.postgresql,driver-xa-datasource-class-name=org.postgresql.xa.PGXADataSource)

NOTE:
Use the above bold values in all steps because this caused some pain while configuring this by myself :) any inconsistency in names, paths, parameters will cause this error:

JBAS010441: Failed to load module for driver [org.postgres]