op1ekun/config.js

## config.js
// LOAD 3rd party libraries as commonJS modules
var module = {
    exports : {}
};
var exports = {};

var config = (function() {
    var BASE = '//localhost:8888/';

    return {
        modules     : {
            'jquery'            : {
                fullpath        : '//code.jquery.com/jquery-1.10.1.min.js',
                requires        : [
                    'oop'
                ]
            },
            'jquery-nicescroll'       : {
                // an empty file to fool the loader
                fullpath        : BASE + 'empty.js',
                // the actual path to be used by jQuery get
                getPath         : '//cdnjs.cloudflare.com/ajax/libs/jquery.nicescroll/3.5.1/jquery.nicescroll.min.js',
                requires        : [
                    'jquery'
                ]
            }
        },
        onProgress  : function(e) {
            // create dynamic, 3rd-party modules
            switch(e.name) {
                case 'jquery' :
                    (function() {
                        var clone;

                        YUI.add('jquery', function(Y) {
                          // create a clone ONLY once
                          if (!clone) {
                              clone           = Y.clone(module.exports, true);
                              module.exports  = {};
                          }

                          Y.namespace('lib')
                              .jQuery = clone;
                        }, '1.10.1', {
                            requires : [
                                'oop'
                            ]
                        });
                    })();
                break;

                case 'jquery-nicescroll'      :
                    var name    = e.name,
                        path    = config.modules[name].getPath;

                        YUI.add(e.name, function(Y) {

                            (function($) {
                                // uses absolute URLs
                                $.get(path, function(code) {
                                    eval('[ function(jQuery) { ' + code + ' }][0]')(Y.lib.jQuery);
                                    Y.Global.fire(name + '-loaded', Y);

                                // retrieve script as PLAIN TEXT
                                // get script doesn't work in sandbox
                                }, 'html');

                            })(Y.lib.jQuery);
                        }, '2.0.3', {
                            requires : [
                                'event-custom',
                                'jquery'
                            ]
                        });
                break;
            }
        }
    };
})();

## index.html
<!doctype html>
<html>
    <head>
        <script src="http://yui.yahooapis.com/3.4.0/build/yui/yui.js"></script>

        <script src="config.js"></script>

        <script>
            YUI().use('event-custom', function(Y) {

                // subscribe first
                Y.Global.on('jquery-nicescroll-loaded', function(Y2) {

                    (function($) {
                        //jQuery with nicescroll plugin available
                    })(Y2.deps.jQuery);
                });

                // then require the plugin
                YUI(config).use('jquery-nicescroll', function(Y2) {});
            });

        </script>
    </head>

    <body>
    </body>
</html>
	// LOAD 3rd party libraries as commonJS modules
	var module = {
	exports : {}
	};
	var exports = {};

	var config = (function() {
	var BASE = '//localhost:8888/';

	return {
	modules : {
	'jquery' : {
	fullpath : '//code.jquery.com/jquery-1.10.1.min.js',
	requires : [
	'oop'
	]
	},
	'jquery-nicescroll' : {
	// an empty file to fool the loader
	fullpath : BASE + 'empty.js',
	// the actual path to be used by jQuery get
	getPath : '//cdnjs.cloudflare.com/ajax/libs/jquery.nicescroll/3.5.1/jquery.nicescroll.min.js',
	requires : [
	'jquery'
	]
	}
	},
	onProgress : function(e) {
	// create dynamic, 3rd-party modules
	switch(e.name) {
	case 'jquery' :
	(function() {
	var clone;

	YUI.add('jquery', function(Y) {
	// create a clone ONLY once
	if (!clone) {
	clone = Y.clone(module.exports, true);
	module.exports = {};
	}

	Y.namespace('lib')
	.jQuery = clone;
	}, '1.10.1', {
	requires : [
	'oop'
	]
	});
	})();
	break;

	case 'jquery-nicescroll' :
	var name = e.name,
	path = config.modules[name].getPath;

	YUI.add(e.name, function(Y) {

	(function($) {
	// uses absolute URLs
	$.get(path, function(code) {
	eval('[ function(jQuery) { ' + code + ' }][0]')(Y.lib.jQuery);
	Y.Global.fire(name + '-loaded', Y);

	// retrieve script as PLAIN TEXT
	// get script doesn't work in sandbox
	}, 'html');

	})(Y.lib.jQuery);
	}, '2.0.3', {
	requires : [
	'event-custom',
	'jquery'
	]
	});
	break;
	}
	}
	};
	})();
	<!doctype html>
	<html>
	<head>
	<script src="http://yui.yahooapis.com/3.4.0/build/yui/yui.js"></script>

	<script src="config.js"></script>

	<script>
	YUI().use('event-custom', function(Y) {

	// subscribe first
	Y.Global.on('jquery-nicescroll-loaded', function(Y2) {

	(function($) {
	//jQuery with nicescroll plugin available
	})(Y2.deps.jQuery);
	});

	// then require the plugin
	YUI(config).use('jquery-nicescroll', function(Y2) {});
	});

	</script>
	</head>

	<body>
	</body>
	</html>