add some more custom config and put every thing in comment in the custom.yaml template
/*
YUI 3.10.3 (build 2fb5187)
Copyright 2013 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
YUI.add("queue-promote",function(e,t){e.mix(e.Queue.prototype,{indexOf:function(t){return e.Array.indexOf(this._q,t)},promote:function(e){var t=this.indexOf(e);t>-1&&this._q.unshift(this._q.splice(t,1)[0])},remove:function(e){var t=this.indexOf(e);t>-1&&this._q.splice(t,1)}})},"3.10.3",{requires:["yui-base"]});