Hi Blondie,

Yes, Peter's script has some issues but it's impossible to fix it because it is posted in binary format (the author doesn't want anybody ti meddle with code).

Today, while drinking my morning coffee, I wrote this script. It takes all indd-files from the selected folder and its subfolders and exports each file to pdf-format saving them in the 'Pdf' folder which is created by script. Note that there is possibility that in different subfolders can be files with identical names. The script handles this situation: it adds a sequential number to the file name so it never gets overwritten. For example: SomeFile.pdf, SomeFile.pdf(1), SomeFile.pdf(2) and so on.

For better performance the script doesn't display documents being opened and closed, but the progress bar shows which file is being processed, how many files have already been processed.

I haven't totally tested it yet — it's already time for me to go to my work — so probably I'll make some changes to it.

Hope this helps.

Regards,
Kasyan

// Script for InDesign CS3-5.
// July 22 2011
// Written by Kasyan Servetsky
// http://www.kasyan.ho.com.ua
// e-mail: askoldich@yahoo.com
//======================================================================================
var gScriptName = "Batch export INDD-files to PDF"; // Name of the script
var gScriptVersion = "1.0″; // Version

var gSet = GetSettings();
CreateDialog();

//===================================== FUNCTIONS  ======================================
function CreateDialog() {
    var pdfPresetsList =app.pdfExportPresets.everyItem().name;    
    var win = new Window("dialog", gScriptName + " – " + gScriptVersion);

    win.p = win.add("panel", undefined, "");
    win.p.alignChildren = "right";
    win.p.alignment = "fill";
    
    win.p.g = win.p.add("group");
    win.p.g.st = win.p.g.add("statictext", undefined, "PDF-presets:");
    win.p.g.ddl = win.p.g.add("dropdownlist", undefined, pdfPresetsList);
    win.p.g.ddl.selection = gSet.selectedPdfPresetIndex;
    win.p.g.ddl.preferredSize.width = 220;

    win.buttons = win.add("group");
    win.buttons.orientation = "row";   
    win.buttons.alignment = "center";
    win.buttons.ok = win.buttons.add("button", undefined, "OK", {name:"ok" });
    win.buttons.cancel = win.buttons.add("button", undefined, "Cancel", {name:"cancel"});

    var showDialog = win.show();

    if (showDialog == 1) {
        gSet.selectedPdfPresetIndex = win.p.g.ddl.selection.index;
        app.insertLabel("Kas_" + gScriptName + gScriptVersion, gSet.toSource());
        Main();
    }    
}
//——————————————————————————————————————————————————–
function Main() {
    var folder = Folder.selectDialog("Select a folder with InDesign files to resave");
    if (folder == null) exit();
    var files = GetFiles(folder);
    var pdfFolder = new Folder(folder.fsName + "/" + "Pdf");
    VerifyFolder(pdfFolder);

    if (files.length == 0) {
        alert("No files to open.", gScriptName + " – " + gScriptVersion);
        exit();
    }

    var pdfPresets =app.pdfExportPresets.everyItem().getElements();
    var selectedPdfPreset = pdfPresets[gSet.selectedPdfPresetIndex];
    var count = 1;
    app.scriptPreferences.userInteractionLevel = UserInteractionLevels.NEVER_INTERACT;

    // Progress bar ———————————————————————————–
    var progressWin = new Window ("window", gScriptName + " – " + gScriptVersion);
    var progressBar = progressWin.add ("progressbar", [12, 12, 350, 24], 0, files.length);
    var progressTxt = progressWin.add("statictext", undefined, "Starting exporting files");
    progressTxt.bounds = [0, 0, 340, 20];
    progressTxt.alignment = "left";
    progressWin.show();
    // Progress bar ———————————————————————————–

    for (var i = 0; i < files.length; i++) {
        var currentFile = files[i];
        
        try {
            var doc = app.open(currentFile, false);
            var docName = doc.name;

            // Progress bar ———————————————————————————–
            progressBar.value = count;
            progressTxt.text = String("Exporting file – " + docName + " (" + count + " of " + files.length + ")");
            // Progress bar ———————————————————————————–

            var file = new File(pdfFolder + "/" + GetFileName(docName) + ".pdf");
            if (file.exists) {
                var increment = 1;
                while (file.exists) {
                    file = new File(pdfFolder + "/" + GetFileName(docName) + "(" + increment++ + ").pdf");
                }
            }
        
            doc.exportFile(ExportFormat.pdfType, file, false, selectedPdfPreset);
            doc.close(SaveOptions.NO);
            count++;
        }
        catch(e) {}
    }

    // Progress bar ———————————————————————————–
    progressWin.close();
    // Progress bar ———————————————————————————–

    app.scriptPreferences.userInteractionLevel = UserInteractionLevels.INTERACT_WITH_ALL;

    alert("Done.", gScriptName + " – " + gScriptVersion);
}
//——————————————————————————————————————————————————–
function VerifyFolder(folder) {
    if (!folder.exists) {
        var folder = new Folder(folder.absoluteURI);
        var array1 = new Array();
        while (!folder.exists) {
            array1.push(folder);
            folder = new Folder(folder.path);
        }
        var array2 = new Array();
        while (array1.length > 0) {
            folder = array1.pop();
            if (folder.create()) {
                array2.push(folder);
            } else {
                while (array2.length > 0) {
                    array2.pop.remove();
                }
                throw "Folder creation failed";
            }
        }
    }
}
//——————————————————————————————————————————————————–
function GetFiles(theFolder) {
    var files = [],
    fileList = theFolder.getFiles(),
    i, file;
    
    for (i = 0; i < fileList.length; i++) {
        file = fileList[i];
        if (file instanceof Folder) {
            files = files.concat(GetFiles(file));
        }
        else if (file instanceof File && file.name.match(/.indd$/i)) {
            files.push(file);
        }
    }

    return files;
}
//——————————————————————————————————————————————————–
function GetFileName(fileName) {
    var string = "";
    var result = fileName.lastIndexOf(".");
    if (result == -1) {
        string = fileName;
    }
    else {
        string = fileName.substr(0, result);
    }
    return string;
}
//——————————————————————————————————————————————————–
function GetSettings() {
    var set = eval(app.extractLabel("Kas_" + gScriptName + gScriptVersion));
    if (set == undefined) {
        set = { selectedPdfPresetIndex : 0 };
    }

    return set;
}
//——————————————————————————————————————————————————–