I just found this message board while I was looking up some info. on the Funderburk family. It has been a few years since you posted this message, so I am unsure if you are still seeking photos of the castle.
My name is Melissa Huante. My mother is a Funderburk, Diane and her parents are James (deceased) and Diana Funderburk originally of Palestine, Texas.
I visited the castle in Germany as well as Altenberg cathedral(built by Funderburk ancestors) while we were in Europe. Was a incredible experience and recommend it to anyone who gets the opportunity to go! I have photos taken in 2005 of both if you are still interested.
Please e-mail me at firstname.lastname@example.org and I can send you photos.