updating readme for andrewplummer#373

README.md

@@ -23,17 +23,18 @@ in all browsing environments (IE, etc) to ensure that it is stable, at least to
 
 ## Custom Builds
 
-Sugar now allows custom builds that let you opt in or out packages. This can be done [here](http://sugarjs.com/customize).
-Custom builds can also be created with `script/build_custom.rb`. With ruby installed, simply call:
+Sugar allows custom builds that let you opt in or out packages. This can be done [here](http://sugarjs.com/customize).
+Custom builds can also be created with `script/create_release.rb`. With ruby installed, simply call:
 
 ```
-ruby script/build_custom.rb core array string
+ruby script/create_release.rb core array string
 ```
 
 listing the packages you want to include. The advantage of using this
 script is that it will perform all the minification on the fly, providing more fine-grained control by allowing you to
 manipulate the source code in `lib/` before building. If you want to remove specific methods from a package, you can do it this way.
-Be careful about removing dependencies, however, especially methods in `core.js`, the extending methods of which are required.
+Be careful about removing dependencies however. `core` is required and will be added automatically. Be careful about removing methods
+in here as many methods are depended on by multiple packages.
 
 
 ## Unit Tests Node