Adding/Updating Record field values in XMLPUB Template

Hi All,

           I would like to add a record field in the XMLPUB Template which will print the invoice using in report definition "BI_PRNXPN01 " which prints the invoice . Eg: I would like to add or modify the Billing specialist details in Printing the invoice using the XMLPUB.Hence i would need to add the details to the XMLPUB Publisher template such that it reflects correctly in printed invoice. The template file is a RTF file which will link to a data source ID which contains an XML and XSD files. The new field should also add the field in the Bursting page "Burst by" field dropdown.