init.rb

module PatchingProjectForEirikb
  def self.included(base) # :nodoc:
    base.send(:include, InstanceMethods)
 
    # Same as typing in the class
    base.class_eval do
      unloadable # Send unloadable so it will not be unloaded in development
 
      after_save :do_something
    end
 
  end
  
  module ClassMethods
  end
  
  module InstanceMethods
    def do_something
      # Shell out or whatever here...
    end
  end
end

require 'dispatcher'

Dispatcher.to_prepare do
  Project.send(:include, PatchingProjectForEirikb)
end