How to customize NotifyFiles in SOA-P 5 ?

Issue

When using the Notifier action with the NotifyFiles target:

    <action class="org.jboss.soa.esb.actions.Notifier" name="notificationAction">
      <property name="okMethod" value="notifyOK" />
      <property name="exceptionMethod" value="notifyError" />
      <property name="destinations">
        <NotificationList type="ok">
          <target class="NotifyConsole" />
          <target class="NotifyFiles">
            <file URI="okFile.txt" append="true" />
          </target>
        </NotificationList>

        <NotificationList type="err">
          <target class="NotifyConsole" />
          <target class="aaa.bbb.esb.CustomNotifyFTP">
            <file URI="errFile.txt" append="true" />
          </target>
        </NotificationList>
      </property>
    </action>

• There are two questions:

1. How to get the NotifyFiles class to log the timestamp to the file ?
2. In case of exception or error NotifyFiles class is not logging the actual exception message to the file. It only logs the request message(esb Message) to the file. How can this be changed?