Batch combine files into one illustrator document - how to open target document?

Question

I am making a script which will:
1) Open a folder of Illustrator files
2) Open each file in the folder (these files are called the source files)
3) Select all the contents of the source file
4) Copy the contents of the source file
5) Paste these contents into a target file as a new layer
6) Ensure the new layer has the same name as the old source file
However, I don't know how to tell Illustrator where my target file is. How can I do this?
Also, when I paste, how can I turn off paste rembers layers. (So the layers get pasted into the new layer that has the same name as the old document).
Here is my code:
// JavaScript Document
//Set up vairaibles
var destDoc, sourceDoc, sourceFolder;
// Select the source folder.
sourceFolder = Folder.selectDialog('Select the folder with Illustrator files that you want to mere into one', '~');
// If a valid folder is selected
if (sourceFolder != null) {
          files = new Array();
          // Get all files matching the pattern
          files = sourceFolder.getFiles();
          if (files.length > 0) {
                    // Get the destination to save the files
                    destDoc = document.selectDialog('Select the final saved document', '~');
                    for (i = 0; i < files.length; i++) {
                              sourceDoc = app.open(files[i]); // returns the document object
                              var myLayers = sourceDoc.layers; // All layers in Active Document
                              //Go through all layers of source document and copy artwork
                              for (i = 0; i < myLayers.length; i++) {
                                        myLayers[i].hasSelectedArtwork = true;
                              with(sourceDoc) {
                                        var count = pageItems.length;
                                        for (var i = 0; i < count; i++) {
                                                  pageItems[i].selected = true;
                                        redraw();
                                        copy();
                                        for (var i = 0; i < count; i++) {
                                                  pageItems[i].selected = false;
                              //Create a new title variable that has the title of the source document
                              var title = sourceDoc.name;
                              var title = title.substring(0, title.length - 4); //(remove extension from name)
                              //Close the Source Document
                              sourceDoc.close(SaveOptions.DONOTSAVECHANGES);
                              //Open the Destination Document and create a new layer in it that is named after the title variation
                              var newLayer = destDoc.layers.add();
                              newLayer.name = title;
                              //Paste into this new layer
                              destDoc = app.paste();
          else {
                    alert('No matching files found');
Thanks in advance for any help   
Edit: Also, when pasting, how can I paste in place instead of just pasting.

Answer 1

I have been studying this script. It is similar to what I need except it places the source files (Instead of copying & pasting them)
http://kelsocartography.com/blog/?p=204
I have adapted the script to my needs and it works perfectly, except it has the same problem as before: It pastes the first source file, but then it endlessly starts pasting the second source file (in a loop) and so I have to force quit.
So my new question is, when looping through files how can you get illustrator to move on the next one?
The original kelsocartography had this line:
thisPlacedItem = newLayer.placedItems.add()
thisPlacedItem.file = imageList[i];
I belive this line is what makes Illustrator move onto the next file, but I am not sure how to adapt it to my code.
Here is my code so far:
function getFolder() {
          return Folder.selectDialog('Please select the folder to be imported:', Folder('~'));
function importFolderAsLayers(selectedFolder) {
          // if a folder was selected continue with action, otherwise quit
          var myDocument;
          if (selectedFolder) {
                    myDocument = app.documents.add();
                    var firstImageLayer = true;
                    var newLayer;
                    var thisPlacedItem;
                    // create document list from files in selected folder
                    var documentList = selectedFolder.getFiles();
                    for (var i = 0; i < documentList.length; i++) {
                              // open each document in file list
                              if (documentList[i] instanceof File) {
                                        // get the file name
                                        var fName = documentList[i].name.toLowerCase();
                                        var sourceDoc = app.open(documentList[i]); // returns the document object
                                        var myLayers = sourceDoc.layers; // Select All layers in Active Document
                                        //Go through all layers of source document and copy artwork
                                        for (i = 0; i < myLayers.length; i++) {
                                                  myLayers[i].hasSelectedArtwork = true;
                                        with(sourceDoc) {
                                                  var count = pageItems.length;
                                                  for (var i = 0; i < count; i++) {
                                                            pageItems[i].selected = true;
                                                  redraw();
                                                  copy();
                                                  for (var i = 0; i < count; i++) {
                                                            pageItems[i].selected = false;
                                        //Create a new title variable that has the title of the source document
                                        var title = sourceDoc.name;
                                        var title = title.substring(0, title.length - 4); //(remove extension from name)
                                        //Close the Source Document
                                        // check for supported file formats
                                        if ((fName.indexOf(".eps") == -1)) {
                                                  continue;
                                        } else {
                                                  if (firstImageLayer) {
                                                            newLayer = myDocument.layers[0];
                                                            firstImageLayer = false;
                                                  } else {
                                                            newLayer = myDocument.layers.add();
                                                  // Give the layer the name of the image file
                                                  newLayer.name = fName.substring(0, fName.indexOf("."));
                                                  // Place the image on the artboard
                                                  sourceDoc.close(SaveOptions.DONOTSAVECHANGES);
                                                  //Paste into this new layer
                                                  newLayer = app.paste();
                    if (firstImageLayer) {
                              // alert("The action has been cancelled.");
                              // display error message if no supported documents were found in the designated folder
                              alert("Sorry, but the designated folder does not contain any recognized image formats.\n\nPlease choose another folder.");
                              myDocument.close();
                              importFolderAsLayers(getFolder());
          } else {
                    // alert("The action has been cancelled.");
                    // display error message if no supported documents were found in the designated folder
                    alert("Rerun the script and choose a folder with images.");
                    //importFolderAsLayers(getFolder());
// Start the script off
importFolderAsLayers(getFolder());