Setting the JMS Header from Payload

Hi Experts,

My requirement is to send the payment data coming from ECC to non sap system.Sender adapter is proxy and receiver is JMS.ECC will be sending the filename in one field and payload content as a string in another field.PI has to set the filename coming from ECC in JMS header property.What configuration changes should i need to make in JMS adapter to achieve it?

Converting the XML to string is possible in PI.But my question is converting the string XML data into XML fields is possible in SAP PI?If so how to do that?

Please provide your suggestion.

Regards,

Karthiga