Here's another interview about Crossroad moments:
http://www.metal-temple.com/interview.asp?id=514
His answer to the question about the collaboration with Dave:
Another thing that caught me by surprise was (amongst other well-known artists) ex-SURVIVOR frontman Dave Bickler’s guest appearance. Under what circumstance did you two join forces? Is he singing only in the "When Rock Was King" song?
Yes, Dave only sings on the "When Rock Was King" track. We did the recording for the PBS Soundstage in Chicago and literally ran in to each other in a hotel. We immediately struck up a great friendship.
That's really a fine moment on this great record...