simplify install instructions

RAILS2.md

@@ -0,0 +1,25 @@
+# Rails 2 Installation
+
+To get HairTrigger working in Rails 2, you need to:
+
+## Add it to your project
+
+Put hairtrigger in your Gemfile, or if you're not using bundler, you can
+`gem install hairtrigger` and then put hairtrigger in environment.rb
+
+## Set up a rake task
+
+Create lib/tasks/hair_trigger.rake with the following:
+
+```ruby
+$VERBOSE = nil
+Dir["#{Gem::Specification.find_by_name('hairtrigger').full_gem_path}/lib/tasks/*.rake"].each { |ext| load ext }
+```
+
+This will give you the `db:generate_trigger_migration` task, and will ensure
+that hairtrigger hooks into `db:schema:dump`.
+
+If you are unpacking the gem in vendor/plugins, this step is not needed
+(though you'll then want to delete its Gemfile to avoid possible conflicts).
+
+

README.md

@@ -7,31 +7,8 @@ and a simple rake task does all the dirty work for you.
 
 ## Installation
 
-### Rails 3 or 4
-
-If you are using Rails 3 or 4, just `gem 'hairtrigger'`
-
-### Rails 2
-
-#### Step 1.
-
-Put hairtrigger in your Gemfile, or if you're not using bundler, you can
-`gem install hairtrigger` and then put hairtrigger in environment.rb
-
-#### Step 2.
-
-Create lib/tasks/hair_trigger.rake with the following:
-
-```ruby
-$VERBOSE = nil
-Dir["#{Gem::Specification.find_by_name('hairtrigger').full_gem_path}/lib/tasks/*.rake"].each { |ext| load ext }
-```
-
-This will give you the `db:generate_trigger_migration` task, and will ensure
-that hairtrigger hooks into `db:schema:dump`.
-
-If you are unpacking the gem in vendor/plugins, this step is not needed
-(though you'll then want to delete its Gemfile to avoid possible conflicts).
+If you are using Rails 3 or beyond, just add `gem 'hairtrigger'` to your
+Gemfile. For Rails 2, it's [slightly more involved](RAILS2.md)
 
 ## Usage