Change KETTLE_HOME when using the mac application

Hi,

I'm trying to figure out how to set a custom location for KETTLE_HOME when using the mac application launcher (i.e. not spoon.sh). I've set the KETTLE_HOME variable, but it only gets recognized if I launch spoon via the command line. I have a feeling I need to edit the Info.plist file, but can't figure out what I'm suppose to do. I tried the below, but it didn't work.

<key>Java</key>
<dict>
<key>ClassPath</key>
<array>
<string>./launcher/pentaho-application-launcher-5.4.0.2-142.jar</string>
<string>./libswt/osx64/swt.jar</string>
</array>
<key>JVMVersion</key>
<string>1.6*</string>
<key>MainClass</key>
<string>org.pentaho.commons.launcher.Launcher</string>
<key>StartOnMainThread</key>
<true/>
<key>VMOptions</key>
<string>-Xmx512m -Xms512m -XX:MaxPermSize=256m -DKETTLEHOME=/Users/aoverton/Documents/pentaho-kettle/dist/home_test</string>
</dict>