README.md in rails-settings-cached-0.6.6 vs README.md in rails-settings-cached-0.7.0

@@ -26,13 +26,28 @@
 ```
 
 If you want custom model name:
 
 ```bash
+$ rails g settings:install
+```
+
+Or use a custom name:
+
+```bash
 $ rails g settings:install SiteConfig
 ```
 
+You will get `app/models/setting.rb`
+
+```rb
+class Setting < RailsSettings::Base
+  source Rails.root.join("config/app.yml")
+  # cache_prefix { "v1" }
+end
+```
+
 Now just put that migration in the database with:
 
 ```bash
 rake db:migrate
 ```
@@ -175,9 +190,11 @@
                    |
                Return nil
 ```
 
 ## Change cache key
+
+When `config/app.yml` has changed, you may need change the cache prefix to expires caches.
 
 ```ruby
 class Setting < RailsSettings::Base
   cache_prefix { 'you-prefix' }
   ...