GLV, the mod instructions are to install like any other mod, rather than stomping your default DATA directory. I believe there is a NULL mod posted somewhere with all the default data files.
I think that like Fryon, JLS was already considering these things for his most recent AIC work. However unless I'm mistaken, I think AIC already considered costs based on Proportions, which already did this sort of consideration (though a bit less thoroughly).
And yes Fryon, we'll all be keeping in mind that you integrated much of this into Adamant Mod months ago. I'm sure it will give us all a warm feeling inside.
PvK