Tommac, will you please, please, please, please quit this business of starting new threads for each tiny new bit of puzzlement that crosses your mind. It's a recipe for confusion, because individuals will inevitably track through your many similar threads in different orders, and answer your questions in different ways, unaware of other answers that have already been given. Most of us now have absolutely no idea where to find any significant previous post that we've read somewhere in this chaotic network you've created.
I, for one, am not going to dodge around after you. I'm prepared to conduct a single conversation on this thread, where we seem to be making some progress.
Otherwise, I wish you luck in your endeavours.

Grant Hutchison