PEAR::Config Question

I'm writing a MSSQL to MySQL Migration Utility, I'm using *Config* to manage the configuration, I want it to read from an XML file. The sturcutre is provided below. Now I want to be able to loop over 'databases' & 'tables'. What's the best way to do this, I'd rather stay away from arrays, is there a DOM access like way to get the objects. And is there a better way to structure my XML? <config> <rdbms>

       <source type="mssql">
           <host></host>
           <user></user>
           <pass></pass>
       </source>              <destination type="mssql">
           ....
       </destination>        </rdbms>

<databases>

       <database newname="legs_jo">JOLEGSZEFT</database>

</databases> <tables>

       <table newname="foo">
           <name>bar</name>
           <columns>
               <col newname="new_col_name" callback="intToDate>start_date</col>
           </columns>
       </table>     </tables>

</config>