gistfile1.js

var app = angular.module('app', [
  'ui.router',
  'app.MyModule'
]);

// State provider from original app.js
app.config(function($stateProvider, $urlRouterProvider){

  $urlRouterProvider.otherwise('/');

  $stateProvider

    // INDEX
    .state('index', {
      url: '/',
      templateUrl: '/templates/index.tmpl.html'
    })

});


// States for MyModule -- these are concatenated together by grunt  
angular.module('app.MyModule', ['ui.router']).config(
  ['$stateProvider'], function($stateProvider){

  $stateProvider

    .state('MyModuleStateOne',{
      url: '/MyModuleStateOneURL',
      templateUrl: '/MyModule/MyModule.tmpl.html'
    })

});