I don't have any experience with 5.0 Ballast, but I bought the Architect's Exam Prep study guides for both PPD and PDD. They are $100 each, you download all of the info (flashcards, 350+ page study guide, and audio of the study guide) and there is an online exam you can take too. I took PPD on 1/30, but got caught up in the server issue so I didn't finish my test (I was on question 92/120), however, I thought it was a good summary for the topics you should know. I purchased the PDD one right after my 1/30 exam to help prepare for PDD (taking 2/23). What I found after seeing both of these study guides 1) there is about 1/3 of the info overlapped between the two and 2) they are just a start to what you should know, but they help gather the topics. The guides themselves could use a good editing as some paragraphs are repeated a few times, there are a few mistakes sprinkled throughout, and some things are grouped a little funny, but they are easy to read and get through. I am now going back and reading some out of my 4.0 Ballast book, and a few other books listed as references on the 5.0 handbook.
So, sorry, I didn't help you at all with the question you asked, but I wanted to share my opinions on other options for study materials out there.