Smart TV App Launch?

Hi all,
I’ve finally upgraded my ancient Sony TV to a spangly new XD85 model and i must say that I’m loving the Smart TV features. I’ve got a basic configuration running with SimpleControl but was wondering if I could make my life a little easier by launching Smart TV apps from an activity start-up routine? The main one being Plex.

I see there is a “.APPLICATION LAUNCH” command for the TV, but how do we find out what the Parameter should be for each app?