As far as I can find, the initial width is controlled in the file flexproj.swf. Sorry, but since the BB AIR is build in Flash, there’s not much to do about it. I’ve tried hijacking the AIR editor, but the width is still inside an SWF. That means you’ll need someone skilled in flash to extract the SWF, make the required changes and repackage the width again. have know idea whether you can reverse engineer an SWF, but that’s the way to go.
OK well thanks William and Peter. Great to have clarification. At least I wont be scratching my head all weekend. It is taking up so much real estate.
I'll add it as feature request.
Have a good weekend