Display custom picture properties in PictureLibrarySlideshowWebPart

SSObj_customprops.js

function SlideshowObjectInitializer() {

  ChangePic = (function(ChangePicOrig) {
      return function() {
          var ssObj = arguments[0];  //SlideShow object     
          if(typeof ssObj.additionalInfo != "undefined")
               ChangePicOrig.apply(this, arguments);
      };
  })(ChangePic);
  
  ShowPic = (function(ShowPicOrig) {
      return function() {
           ShowPicOrig.apply(this, arguments); //call original ShowPic
           var ssObj = arguments[0];  //SlideShow object     
           ShowAdditionalPicInfo(ssObj);
      };
  })(ShowPic);
    
  function ShowAdditionalPicInfo(ssObj)
  {
      var curPicIdx=ssObj.index; //current picture index
      if(ssObj.additionalInfo.length == 0)
          return;
          
      var picEntry = ssObj.additionalInfo[curPicIdx]; 
      
      var ssobj_ext_cell = '<td>'; 
      ssobj_ext_cell += '<div style="font-size:22px;"><span style="font-weight:bold">Car Model:</span>' + picEntry.CarModel + '</div>';
      ssobj_ext_cell +=  '<div style="font-size:22px;"><span style="font-weight:bold">Car Description:</span>' + picEntry.CarDesc + '</div>';
      ssobj_ext_cell += '</td>';
      
      var ssobj_row = jQuery(ssObj.cell).closest('tr');
      if(ssobj_row.find('td').length > 1) { 
         ssobj_row.find('td:nth-child(2)').replaceWith(ssobj_ext_cell);
      }
      else   
         ssobj_row.append(ssobj_ext_cell);
      
  }
 
  SlideshowObject = (function(SlideshowObjectOrig) {
      return function() {
      
          SlideshowObjectOrig.apply(this, arguments);
          var ssobj = this;
          ExecuteOrDelayUntilScriptLoaded(function(){
                  loadCarPicturesAdditionalInfo(function(picEntries){     
                      ssobj.additionalInfo = picEntries;
                      ChangePic(ssobj);
                  });
          },'SP.js');
           
          
      };
  })(SlideshowObject);
  
 
}   

function loadCarPicturesAdditionalInfo(cbPicsResults) {
        var context = new SP.ClientContext.get_current();
        var web = context.get_web();
        var list = web.get_lists().getByTitle("Pictures");
        var viewXml = '<View></View>';
        var query = new SP.CamlQuery();
        query.set_viewXml(viewXml);
        var items = list.getItems(query);
        context.load(items,"Include(CarModel,CarDesc)");
        context.add_requestSucceeded(onLoaded);
        context.add_requestFailed(onFailure);
        context.executeQueryAsync();
        function onLoaded() {
            var picEntries = [];
            var itemsCount = items.get_count();
            for (i = 0; i < itemsCount; i++) {
                var item = items.itemAt(i);
                var picEntry = item.get_fieldValues();
                picEntries.push(picEntry);
            }
            cbPicsResults(picEntries);
        }
        function onFailure() {
            cbPicsResults(null);
        }   
}