1. Is there a way to have the screensaver play an mp3 (or aiff)
file? How can we "attach" a sound file to a screensaver in QC?
No. You would need to write a regular screen saver project in Xcode,
play the QC composition in the screen saver view using a QCRenderer
and play your audio in parallel
2. Is there a way to have each of the 6 faces of the cube display a
DIFFERENT movie (.mov) or jpeg?
Yes, just use multiple image importers or image from movie patches