Elimination of Physical_Colour parts from the library

[Orion Pobursky]

Well, what I would do is simply read the DAT file of the obsolete part, to see which DAT file is to be used in its place.  (If I correctly understand your question.)  

Thanks, 
Franklin

I meant in the future. For the current parts, presumably an editor can update the reference much like a ~MovedTo but changing the color as well as the file.