SQL 2K JDBC driver with WebSphere

Hi,
I am trying to use SQL 2K JDBC driver SP3 in WebSphere app server.
I created an new JDBC provider, point the class path to where msbase.jar,
mssqlserver.jar, and msutil.jar files are. I did not put anything in the
"Native Library Path". Implementation classname is
"com.microsoft.jdbcx.SQLServerDataSouce". Are these correct?

I also need to create datasource for this driver and don't know what to put
in the "DataSource Helper Classname" field. Any suggestions?

Thanks,
Alex