How do I add a new field in a SiebelMessage?

Hi,

Here's what my SiebelMessage looks like when I convert it to XML.

<?xml version="1.0" encoding="UTF-8"?>

<SiebelMessage IntObjectFormat="Siebel Hierarchical" MessageType="Integration Object" IntObjectName="Import Files Internal - Sectvar" MessageId="">

<ListOfImportFilesInternal>

<PvFileImport>

<Filename>sectvar-dev-a.dat</Filename>

</PvFileImport>

<PvFileImport>

<Filename>sectvar-dev.dat</Filename>

</PvFileImport>

<PvFileImport>

<Filename>sectvar-new-test.dat</Filename>

</PvFileImport>

</ListOfImportFilesInternal>

</SiebelMessage>

Here's what I want to achieve.

<?xml version="1.0" encoding="UTF-8"?>

<SiebelMessage IntObjectFormat="Siebel Hierarchical" MessageType="Integration Object" IntObjectName="Import Files Internal - Sectvar" MessageId="">

<ListOfImportFilesInternal>

<PvFileImport>

<Filename>sectvar-dev-a.dat</Filename>

                         <FileType>Section</FileType>

</PvFileImport>

<PvFileImport>

<Filename>sectvar-dev.dat</Filename>

                         <FileType>Section</FileType>

</PvFileImport>

<PvFileImport>

<Filename>sectvar-new-test.dat</Filename>