Need conversion logic for the xml sending from legacy system ...!!!

Hi Experts ,

we have one requirement where in the legacy system ( Sender system) is sending .xml  file and PI needs to pick the file and send it to ECC Via IDOC AAE Receiver Adapter  to R/3  (SAP ECC) System .

The problem is the  .xml file which PI receives is in a different format  which is shown below

</tns:Header>

    <tns:Body>

        <esa:Payload>

            <esa:Header>

                <PayloadName></PayloadName>

                <PayloadVersion>1.0</PayloadVersion>

                <PayloadCreated>2014-01-07T02:39:55.793Z</PayloadCreated>

                <PayloadSize units="Bytes">432</PayloadSize>

            </esa:Header>

            <esa:Data>

                <zcs:HUM xmlns:zcs="com.">

                    <Hum_Number>00393155965135748871</Hum_Number>

                    <Source_Storage_Location>9000</Source_Storage_Location>

                    <Destination_Storage_Location>0100</Destination_Storage_Location>

                    <Material_Number>000000000000004123</Material_Number>

                    <Batch_Number>321940071 </Batch_Number>

                    <Quantity>0000000096000</Quantity>

                    <Production_Version>A100</Production_Version>

                    <Hostname>POSPI000003</Hostname>

                </zcs:HUM>

            </esa:Data>

        </esa:Payload>

    </tns:Body>

</tns:Envelope>|]

need help to  convert this  .xml into PI Standard xml  format ( i mean without esa,zcs, ..So that at PI the message gets passed  successfully without throwing  xml parser issue or xml well not formed error .)  .

do i need to write any java code for this ?

Please experts needs your suggestions here .

regards,

khan ,