Jboss portal server DB customaization query

[Minal Singh]

Hi,
I was trying out a small program where I add a new column in the existing table (jbp_users) which comes(gets created) with jboss portal server 2.6.4. and the database is in MS SQL Server2005.

I have created a new property "age" and have changed appropriate files to add this new property.

Files changed to add new property :
Identity.properties
profile.xhtml
viewProfile.xhtml
profile-config.xml
identity-ui-config.xml as per the reference document.

Now this newly added property goes to dynamic store (in table jbp_user_prop) and I want this property to get added as a column in the existing table jbp_users. So I tried to change domain.hbm.xml in

<jboss_home>/server/default/deploy/jboss-portal.sar/conf/hibernate/user

But the thing is , If I change domain.hbm.xml

<hibernate-mapping>
   <class
      name="org.jboss.portal.identity.db.HibernateUserImpl"
      table="jbp_users">
      <cache usage="read-write"/>
       <id
          name="key"
          column="jbp_uid"
          type="java.lang.Long">
          <generator class="native">
             <param name="sequence">user_seq</param>
          </generator>
       </id>
........
.........
 
<!-- Code changed in domain.hbm.xml -->
<property
          name="age"
          column="jbp_age"
          type="java.lang.String"
          update="true"
          insert="true"
          unique="false"/>
....
......

I get exceptions saying that there is no getter/setter methods in org.jboss.portal.identity.db.HibernateUserImpl

Can I edit this file present in portal-identity-lib.jar?
What could be the solution??