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
:javascript
try { CFInstall.check({mode: “overlay”,destination:
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’

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