README.md in yawl_rails-0.2.0 vs README.md in yawl_rails-0.2.1

@@ -1,11 +1,23 @@
 # Yawl Rails
 
 This is the UI and Rails integration component of [yawl](https://github.com/ricardochimal/yawl)
 
-## Migrations
+## Install Migrations
 
-The engine should automatically hook into Rails and allow you to *just* run `rake db:migrate`
+For rails versions >= 4, the engine should automatically hook into Rails and allow you to *just* run `rake db:migrate`.
+
+For rails 3, migrations should be installed in the target app:
+
+```
+rake yawl_rails:install:migrations
+```
+
+Review the generated migrations then migrate:
+
+```
+rake db:migrate
+```
 
 ## Routing
 
 I like to mount the engine at the root, so the following would work but you can also mount it anywhere you see fit.