YUI3 custom module that broadcasts when yui2 dependencies are loaded.js

YUI.add('prop.mod-a', function (Y) {

    /* Your module code here */

    // shortcut to ensure Y.config.modules object is in place
    Y.namespace('config.modules')['yui2-utilities'] = {
        fullpath: 'http://yui.yahooapis.com/2.8.0r4/build/utilities/utilities.js'
    };

    Y.use('yui2-utilities', function (Y) {
        Y.fire('myapp:ready');
    });

},'0.0.1', { requires: ['event-custom-base'] });

YUI().use('prop.mod-a', function (Y) {

    Y.on('myapp:ready', function () {

        /* implementation code */

    });

});