Not sure if everyone has figured this one already, but I thought I would share my recent findings.
First. I am currently using Boxee on a Mac with Remote Buddy 1.16 and my Harmony One. I want to be able to press ONE button on my remote and immediately launch Boxee and load Pandora immediately. I wanted the same for boxee's Netflix application.
This is how I did it.
1) Assuming you guys know where your keyboard.xml file is in your keymaps folder, open this add the following lines in the <Global><keyboard> section.
Save the file.
2) Open up boxee and press the letter 'P' key to launch Pandora. Press the 'N' key to launch Netflix.. YAY! Cool, huh?
3) Now, add the following AppleScript to a Custom action in Remote buddy as step 1.
tell application "Boxee" to activate
Then for step 2. tell remote buddy to issue the keystroke 'p' or 'n'
Map this custom action to any key on your remote and watch the magic.
You will find that with one press of a button on your remote you can launch boxee and any app of your choice immediately.
Yes, this is a vague tutorial, Im sorry Boxee-family. I'm at work and don't need the boss asking what I'm doing. PM if you have more questions!