Hi Steve,
The tool I've created to create the flight plans and install them on my system, creates placeholders for paints that haven't been installed yet. I have another tool which keeps tracks of all installed repaints, and this counts the placeholders when creating the aircraft.txt files.
I might make changes to this tool as the question has cropped up before on the AIG forums.
N978PC is actually a Phenom 300, which there is no proper AI models for. There is a CamSim model for this, but I've decided to not paint this as there is no proper (read layered) paint kit for it.
Morten