Sounds good to me, but to answer your doubt, trim levels certainly do not belong in there. I am very surprised you of all people would even consider that... I mean the point of a police package is to be a speical model in and of itself, it IS the trim level. After all you don't list Crown Victoria police models as "Standard" or "LX" so you wouldn't do that for any other cars either. A police package Taurus is not a "GL" or "L", it is simply a "Police Package".