Using YUI group configs to combo handle custom modules

gistfile1.js

YUI({
  groups: {
    'my-group': {
      comboBase: 'http://example.com/combo?',
      combine  : true,
      root     : 'build/',

      modules: {
        /* custom module definitions */
      }
    }
  }
}).use('node', 'my-module', function (Y) {

  /* loads YUI modules from yui.yahooapis.com, and your modules from
     example.com/combo */

});