Created a generator that copies an initializer with configuration values.

generators/devise_install/USAGE

@@ -0,0 +1,3 @@
+To copy a Devise initializer to your Rails App, with some configuration values, just do:
+
+    script/generate devise_install

generators/devise_install/devise_install_generator.rb

@@ -0,0 +1,9 @@
+class DeviseInstallGenerator < Rails::Generator::Base
+
+  def manifest
+    record do |m|
+      m.file "devise.rb", "config/initializers/devise.rb"
+    end
+  end
+
+end

generators/devise_install/templates/devise.rb

@@ -0,0 +1,33 @@
+# Use this hook to configure devise mailer, warden hooks and so forth. The first
+# four configuration values can also be set straight in your models.
+Devise.setup do |config|
+  # Invoke `rake secret` and use the printed value to setup a pepper to generate
+  # the encrypted password. By default no pepper is used.
+  # config.pepper = "rake secret output"
+
+  # Configure how many times you want the password is reencrypted. Default is 10.
+  # config.stretches = 10
+
+  # The time you want give to your user to confirm his account. During this time
+  # he will be able to access your application without confirming. Default is nil.
+  # config.confirm_within = 2.days
+
+  # The time the user will be remembered without asking for credentials again.
+  # config.remember_for = 2.weeks
+
+  # Configure the e-mail address which will be shown in DeviseMailer.
+  # config.mail_sender = "foo.bar@yourapp.com"
+
+  # If you want to use other strategies, that are not (yet) supported by Devise,
+  # you can configure them inside the config.warden block. The example below
+  # allows you to setup OAuth, using http://github.com/roman/warden_oauth
+  #
+  # config.manager do |manager|
+  #   manager.oauth(:twitter) do |twitter|
+  #     twitter.consumer_secret = <YOUR CONSUMER SECRET>
+  #     twitter.consumer_key  = <YOUR CONSUMER KEY>
+  #     twitter.options :site => 'http://twitter.com'
+  #   end
+  #   manager.default_strategies.unshift :twitter_oauth
+  # end
+end

generators/devise_views/USAGE

@@ -1,3 +1,3 @@
-To copy all session, password and confirmation views from devise to your app just run the following command:
+To copy all session, password, confirmation and mailer views from devise to your app just run the following command:
 
     script/generate devise_views