IriSP.loadLibs = function( libs, config, metadata_url, callback ) {

    // Localize jQuery variable

    var $L = $LAB.script(libs.jQuery).script(libs.swfObject)

                .script(libs.jQueryUI)

    if (config.player.type === "jwplayer") {

      // load our popcorn.js lookalike

      $L = $L.script(libs.jwplayer);

    } else {

      // load the real popcorn

      $L = $L.script(libs.popcorn).script(libs["popcorn.code"]);

      if (config.player === "youtube")

        $L = $L.script(libs["popcorn.youtube"]);

      if (config.player === "vimeo")

        $L = $L.script(libs["popcorn.vimeo"]);

      /* do nothing for html5 */

    }       

    /* widget specific requirements */

    for (var idx in config.gui.widgets) {

      if (config.gui.widgets[idx].type === "PolemicWidget") {        

        $L.script(libs.raphael);

      }

    }

    // same for modules

    /*

    for (var idx in config.modules) {

      if (config.modules[idx].type === "PolemicWidget")

        $L.script(libs.raphaelJs);

    }

    */

    $L.wait(function() {

      IriSP.jQuery = window.jQuery.noConflict( true );

      var css_link_jquery = IriSP.jQuery( "<link>", { 

        rel: "stylesheet", 

        type: "text/css", 

        href: libs.cssjQueryUI,

        'class': "dynamic_css"

      } );

      var css_link_custom = IriSP.jQuery( "<link>", { 

        rel: "stylesheet", 

        type: "text/css", 

        href: config.gui.css,

        'class': "dynamic_css"

      } );

      css_link_jquery.appendTo('head');

      css_link_custom.appendTo('head');

      IriSP.setupDataLoader();

      IriSP.__dataloader.get(metadata_url, 

          function(data) {

            /* save the data so that we could re-use it to

               configure the video

            */

            IriSP.__jsonMetadata = data;

            callback.call(window) });

    });

};