Ok. I found and opend the js file, but since I'm only a lowly designer that doesn't know much about code, what do I change exactly in the script below?

/********************************************************************* ****

*

* ADOBE CONFIDENTIAL

* ___________________

*

*  Copyright 2012 Adobe Systems Incorporated

*  All Rights Reserved.

*

* NOTICE:  All information contained herein is, and remains 

* the property of Adobe Systems Incorporated and its suppliers,

* if any.  The intellectual and technical concepts contained

* herein are proprietary to Adobe Systems Incorporated and its

* suppliers and are protected by trade secret or copyright law.

* Dissemination of this information or reproduction of this material

* is strictly forbidden unless prior written permission is obtained

* from Adobe Systems Incorporated.

********************************************************************* *****/

/* ******************************************** GLOBAL VARIABLES **************************************** */

/* *********************************************  OnOpen Function ***************************************** */

var gProtoProjectDoc = 0;

function CloseProtoDocument()

{

          dw.revokeIdleHandler("CloseProtoDocument");

          if(gProtoProjectDoc == 0)

                    return;

          var protoOpenedDoc = gProtoProjectDoc;

          gProtoProjectDoc = 0;

          dw.setActiveWindow(protoOpenedDoc);

          dw.closeDocument(protoOpenedDoc);

}

function onOpen()

{

  var filePath = "";

  var  src, metafile;

  var filename = "";

  try{

                    filename  = dw.getDocumentDOM().URL;

          }

  catch(err){

          // do nothing

  }

          if(filename.substr(filename.length-4) == ".pro")

          {

                    var dompro = dw.getDocumentDOM();

                    gProtoProjectDoc = dompro;

                    /* The pro window should be closed all the time so moving this to the top */

                    dw.registerIdleHandler("CloseProtoDocument", function() { CloseProtoDocument();}, 1);

                    var htmlurl = extractProtoProject(filename);

                    if(!htmlurl)

                    {

                              alert(dw.loadString("protoDWExt/zipExtractionFail"));

                              return;

                    }

                    var siteurl = CreateSteFile(htmlurl);

                    if(siteurl == "")

                    {

                              alert(dw.loadString("protoDWExt/newSiteFail"));

                              return;

                    }

                    dompro.setView("split");

                    //setTimeout('CloseProtoDocument()',1000);

                    //dw.releaseDocument(dompro);

                    /*  Import the site into dreamweaver and expand it  and open the Index.html*/

                    if(!site.importSite(siteurl))

                    {

                              alert(dw.loadString("protoDWExt/siteImportFail"));

                              return;

                    }

        /* We need to pass an array of url to the setSelection() function*/

                    var finalIndexHTMLPath = htmlurl + "/Index.html";

        var indexFileName =  new Array();

        indexFileName[0] = finalIndexHTMLPath;

        site.setSelection(indexFileName);

//                    site.open();

                    var newProtoIndexDoc = dw.openDocument(finalIndexHTMLPath);

                    if(!newProtoIndexDoc)

                    {

                              alert(dw.loadString("protoDWExt/indexHTMLLoadFail"));

                    }

                    else

                    {

                              newProtoIndexDoc.setDesignViewMode("live");

                    }

                    /* Delete the ste file created */

                    DWfile.remove(siteurl);

          }

}

//********************************************* LOCAL FILES *************************************************

function extractProtoProject(filename)

{

                    var filepath = MMNotes.localURLToFilePath(filename);

                    var htmlfileName = "";

                    var htmlurl = "";

                    try{

                              htmlfileName = AdobeProtoDWExt.OpenProtoProject(filepath);

                              htmlurl = MMNotes.filePathToLocalURL(htmlfileName);

                    }

                    catch(err){

                              htmlurl = 0;

                    }

                    return htmlurl;

}

/*  Currently the ste name is always c:/temp/mydata sice we have an intension to delete it (There should not be any space in site name) */

function CreateSteFile(htmlurl)

{

                    var PLATFORM = navigator.platform;

                    var FILE_SEPARATOR = (PLATFORM == "Win32") ? "\\" : ":";

                    var projectName =  htmlurl.substr(htmlurl.lastIndexOf("/") + 1);

                    var rootFolderurl  = htmlurl;

                    var sitename = rootFolderurl + projectName + ".ste";

                    var siteurl = dreamweaver.getTempFolderPath() + "/Protosite.ste";

                    var writeSucessFlag = true;

                    var filepath = MMNotes.localURLToFilePath(rootFolderurl)  + FILE_SEPARATOR;

                    var rootFolderPath = encodeURI(filepath);

                    var siteText = "<?xml version=\"1.0\" encoding=\"utf-8\" ?> \n<site>\n\t <localinfo sitename=\""+projectName+"\" localroot=\""+ rootFolderPath + "\"/> \n</site>";

                    //alert(siteText);

                    writeSucessFlag = DWfile.write(siteurl,siteText);

                    if(! writeSucessFlag)

                    {

                              siteurl = "";

                    }

                    return siteurl;

}