I adapted the script I had posted here for illustrator to iterate over all paths in paths panel (but not layer bound masks sorry you need to iterate those separately).

// jooExportSVGScaffold.jsx
#target photoshop

main();

function ppos(point){
    return ""+point[0]+" "+point[1] 
}


function handlePath(path) {
    var out = "";    
    var pnts = path.pathPoints;
    
    var ipos = pnts[0].anchor;

    var pos = pnts[0].leftDirection;
    var pos2, pos3;
    out="M"+ppos(ipos);
    for (var p=1; p<pnts.length; p++){
       pos2 = pnts[p].rightDirection;
       pos3 = pnts[p].anchor;
       out += "C"+ppos(pos)+" "+ppos(pos2)+" "+ppos(pos3);
       pos = pnts[p].leftDirection;
    }
    if (path.closed){
        pos2 = pnts[0].rightDirection;
        pos3 = pnts[0].anchor;
        out += "C"+ppos(pos)+" "+ppos(pos2)+" "+ppos(pos3)+"Z";
    }
    return out;
}

function main() {
    var sel = app.activeDocument.selection; 
    var file = File.saveDialog('save svg path', 'SVGPath:*.svg');
 
    file.open('w');
    
    file.writeln('<?xml version="1.0" encoding="utf-8"?>');
    file.writeln('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">');
    file.writeln('<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"');
    file.writeln('width="595.28px" height="841.89px" viewBox="0 0 595.28 841.89" enable-background="new 0 0 595.28 841.89" xml:space="preserve">');
       
    
    var doc = app.activeDocument;
    var paths = doc.pathItems;

    for (var i=0; i<paths.length; i++){
        var subpaths = paths[i].subPathItems;
        
        for (var j=0; j<subpaths.length; j++){
            data=handlePath(subpaths[j]);  
            file.writeln('<path fill="none" stroke="black" d="'+data+'"/>');
        }
    }
    file.writeln('</svg>'); 
    file.close();
}

This should work in CS3 but i haven't tested. Put script in a file with jsx ending and either execute in extendscript toolkit or drag the text file into the toolbar of Photoshop to execute. (do not drag on top of document).