Thanks for all the input. . .in the end, I spoke with the county representative and we decided it would be easiest in the long run if I made the changes for them. As has been alluded to, a file this big gets complicated and has a lot going on that would take a while to reverse-engineer.
Robert - I understand what you mean by "it may be the highest money per hour you ever make." Now I'll have to actually work for it!
Here are some pics just for fun.
Craig