Include Metadata in Save for Web JPEGS

Question

I notice in Photoshop CS 4 that there is a new "Include Metadata" menu option in the SaveForWeb and Devices.
I have a Javascript which creates multiple files based on various sizes and i would like to know how i can get the Metadata from the original PSD file to be included in the JPEGS.
This is important as i have a database which reads the metadata fields to know where to place the images.
this is my ExportForWeb step
function SaveForWeb(saveFile) { 
var sfwOptions = new ExportOptionsSaveForWeb(); 
   sfwOptions.format = SaveDocumentType.JPEG; 
   sfwOptions.includeProfile = true;  //remove ICC profile from image
   sfwOptions.interlaced = 0; 
   sfwOptions.optimized = true; 
   sfwOptions.quality = 80;  //image quality has been set to high
app.activeDocument.exportDocument(saveFile, ExportType.SAVEFORWEB, sfwOptions);
many thanks

Answer 1

This is what I use...
function Cs4SFW(FileName,Quality,MetaData,Profile,Progressive) {
  function cTID(s) { return app.charIDToTypeID(s); };
  function sTID(s) { return app.stringIDToTypeID(s); };
  Metadata:-
'MDAl'  All metadata 'MDNn'  No metadata
'MDCp'  Copywright  'MDCC' Copyright and contact
'MDAx'  All except camera info
Profile:-
'CHsR' sRGB Profile    'CHDc'  Use document profile
//Set defaults
if(MetaData == undefined) MetaData = 'MDNn';
if(Quality == undefined) Quality = 80;
if(Profile == undefined) Profile = 'CHsR';
if(Progressive == undefined) Progressive = 1;
    var desc7 = new ActionDescriptor();
        var desc8 = new ActionDescriptor();
        desc8.putEnumerated( cTID('Op  '), cTID('SWOp'), cTID('OpSa') );
        desc8.putEnumerated( cTID('Fmt '), cTID('IRFm'), cTID('JPEG') );
        desc8.putBoolean( cTID('Intr'), false );
        desc8.putInteger( cTID('Qlty'), Quality );
        desc8.putInteger( cTID('QChS'), 0 );
        desc8.putInteger( cTID('QCUI'), 0 );
        desc8.putBoolean( cTID('QChT'), false );
        desc8.putBoolean( cTID('QChV'), false );
        desc8.putBoolean( cTID('Optm'), true );
        desc8.putInteger( cTID('Pass'), Progressive ); // 1 = Optimized 3 = Progressive
        desc8.putDouble( cTID('blur'), 0.000000 );
        desc8.putBoolean( cTID('EICC'), false ); //Embed Color Profile, Bool
        desc8.putBoolean( cTID('Mtt '), false );
        desc8.putInteger( cTID('MttR'), 255 );
        desc8.putInteger( cTID('MttG'), 255 );
        desc8.putInteger( cTID('MttB'), 255 );
        desc8.putBoolean( cTID('SHTM'), false );
        desc8.putBoolean( cTID('SImg'), true );
        desc8.putEnumerated( cTID('SWch'), cTID('STch'), cTID(Profile) );
        desc8.putEnumerated( cTID('SWmd'), cTID('STmd'), cTID(MetaData) );
        desc8.putBoolean( cTID('SSSO'), false );
            var list2 = new ActionList();
        desc8.putList( cTID('SSLt'), list2 );
        desc8.putBoolean( cTID('DIDr'), false );
        desc8.putPath( cTID('In  '), new File( FileName) );
    desc7.putObject( cTID('Usng'), sTID('SaveForWeb'), desc8 );
    executeAction( cTID('Expr'), desc7, DialogModes.NO );