Problem
You want to use ActiveScaffold in Rails 2.2, in a model that you have created using the standard Rails scaffolding script.

Solution

1. Install the ActiveScaffold plugin:

   script/plugin install git://github.com/activescaffold/active_scaffold.git -r rails-2.2

2. In your layout (model or application for all models) add the following:

   <%= javascript_include_tag :defaults %>
   <%= active_scaffold_includes %>

3. In your controller file delete all the standard scaffolding code and add one line, so that your new controller should look like:

   class SomethingsController < ApplicationController
     active_scaffold :something
   end

4. To configure a RESTful scaffold add the following to your route.rb file:

   map.resources :somethings, :active_scaffold => true

5. Delete the views that were created from the standard rails scaffolding in the views/somethings folder (edit, show, index ...)
6. Restart your server

You should now have an active scaffold for your model.