I usually don't reply to posts asking for advice from people who have actually sat for the exam (since I haven't), but I would absolutely make a pass of the images in RR. Its probably one of the better sources for numerous crystal clear images from all organ systems, excluding a texts like Big Robbins, Rubins, or websites such as WebPath. I can't speak to the margin notes. There are so many of those that it may take quite a while, so if you're down to the wire I would stick with the images.
My $0.02