Unfortunately there is nobody on the staff here (including me) that has a good handle on the reason for the specific colors - "Dougy" is no exception. Most have a general practical "understanding" (you do this and get that - without really knowing what happens) but I am trying to explain what is actually going on in as simple (problem is that the reasons are not simple!) a summary as possible. This may be impossible and maybe I should just back off from an explanation and leave it as "wow! you get colors!! neat-o!!!" :) andy
