README.md in appbundle-updater-0.0.1 vs README.md in appbundle-updater-0.0.2

@@ -7,10 +7,16 @@
 * A ChefDK or Chef Client installation in the standard location.
 * You need to have the `git` command in your PATH.
 
 ## Usage Examples
 
+Install as a gem:
+
+```
+gem install appbundle-updater
+```
+
 Updating chef in the /opt/chefdk bundle to master:
 
 ```
 sudo appbundle-updater chefdk chef master
 ```
@@ -45,9 +51,25 @@
 ```powershell
 & appbundle-updater chefdk test-kitchen master
 ```
 
 If you don't want "master" you can use any other git tag/branch/sha/etc that git understands.
+
+## Execution and Target rubies
+
+This does not need to be installed into the embedded ruby that you are doing the update on.
+
+You can install this into an rvm gemset as a local user (for example) and run:
+
+```
+rvmsudo appbundle-updater chef chef master
+```
+
+It will invoke appbundle-updater via rvm (using your user ruby+gemset under sudo), but will
+correctly break the bundle and setup the PATH in order to manipulate your /opt/chefdk or
+/opt/chef ruby environment.
+
+Only tested with RVM, but chruby and rbenv are usually simpler and easier.
 
 ## <a name="development"></a> Development
 
 * Source hosted at [GitHub][repo]
 * Report issues/questions/feature requests on [GitHub Issues][issues]