Rails 3.1 How to use CDN-hosted jQuery libraries vs assets pipeline

I am testing some code to be used out of an Rails app, using JQuery
and jQuery-ui
as the final html code will have links to CDN-hosted libraries, with
links to
src : "http:////ajax.googleapis.com/ajax/libs/jquery/1.6.4/
jquery.min.js" and
src: "http//ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/jquery-
ui.min.js"

how can I use these standards with Rails 3.1 assets ?
should I modify the application.js and get rid of //= require query
I'm a little bit lost ...

See here:

application.js

// This is a manifest file that’ll be compiled into including all the files listed below.

// Add new JavaScript/Coffee code in separate files in this directory and they’ll automatically

// be included in the compiled file accessible from http://example.com/assets/application.js

// It’s not advisable to add code directly here, but if you do, it’ll appear at the bottom of the

// the compiled file.

//

//= require jquery_ujs

// your stuff below

jquery.js

// This is a manifest file that’ll be compiled into including all the files listed below.

// Add new JavaScript/Coffee code in separate files in this directory and they’ll automatically

// be included in the compiled file accessible from http://example.com/assets/application.js

// It’s not advisable to add code directly here, but if you do, it’ll appear at the bottom of the

// the compiled file.

//

// This is the fallback file that is used when all other things fail.

//= require jquery

//= require jquery-ui

head.js

// This is a manifest file that’ll be compiled into including all the files listed below.

// Add new JavaScript/Coffee code in separate files in this directory and they’ll automatically

// be included in the compiled file accessible from http://example.com/assets/application.js

// It’s not advisable to add code directly here, but if you do, it’ll appear at the bottom of the

// the compiled file.

//

//

//= require external_head/modernizr-2.0

your footer template (I left a lot of other stuff in there, might be helpful)

%script{:type=>‘text/javascript’}

="window.loginStatus = {loggedIn: #{current_user ? 'true' : 'false'} , service_facebook : #{current_user && current_user.service_facebook? ? 'true' : 'false'} , service_twitter : #{current_user && current_user.service_twitter? ? 'true' : 'false'} };"

= javascript_include_tag “http://connect.facebook.net/en_US/all.js

= javascript_include_tag “http://ajax.googleapis.com/ajax/libs/jquery/#{APP_JQUERY_VERSION}/jquery.min.js

= javascript_include_tag “http://ajax.googleapis.com/ajax/libs/jqueryui/#{APP_JQUERYUI_VERSION}/jquery-ui.min.js

-jquery_path = asset_path(‘jquery.js’)

:javascript

!window.jQuery && document.write(unescape('%3Cscript src="#{jquery_path}"%3E%3C/script%3E'))

= javascript_include_tag “http://maps.google.com/maps/api/js?sensor=false&key=#{APP_GOOGLE_MAPS_KEY}

= yield :templates

= javascript_include_tag “application”, :debug => Rails.env.development?

/[if lt IE 8 ]

= javascript_include_tag '[http://ajax.googleapis.com/ajax/libs/chrome-frame/1/CFInstall.min.js](http://ajax.googleapis.com/ajax/libs/chrome-frame/1/CFInstall.min.js)'

:javascript

	try { CFInstall.check({mode: "overlay",destination: "[http://freshfugu.com](http://freshfugu.com)"}); } catch(ex) {}

-# Append your own using content_for :javascripts

= yield :javascripts

-# yui profiler and profileviewer

-#- if Rails.env == ‘development’

-# = javascript_include_tag ‘profiling/yahoo-profiling.min’, ‘profiling/config’