To conclude this threat, I would like to say that this posting had a great response to my question, thanks.
I will take the suggestions from the people that told me to keep my guitars tuned to 440-A, concert pitch. It seems that I am a outcast with this type of tuning. But I fully agree to the standard tuning, to be in tune with our musicians, and because sometimes when playing along with our musicians they will wonder why I am not in tune with them.
Well for the DADGAD, I am going to learn it, and start learning how to play the Mary Ellen Carter, because it is my favorite song.
Anyway, thanks
Steven G.