JBoss Postgresql Module

Just download the latest jdbc4 driver and place it into JBOSS_HOME/modules/org/postgresql/main. Then create a file module.xml in the same folder with the following content (replace filename if necessary):

<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="org.postgresql">
    <resources>
        <resource-root path="postgresql-9.1-901.jdbc4.jar"/>
    </resources>
    <dependencies>
        <module name="javax.api"/>
        <module name="javax.transaction.api"/>
    </dependencies>
</module>