I figured I'd throw some love in here from OSU-COM and Poppie. His book is written for step 1 AND step 2. In our lectures I typically follow his ppts then highlight only the things he addresses. I'm taking both boards in June, so I've been going through the most efficient board regimen and that seems to be it. His book has alot of detail that may not be needed yet.
The bootlegged audio is approx 8 years old and his book has been republished a time or two. That is where the discrepancy/hopping around comes from. His current audio/video files (which shouldn't be out) correlate directly with his current RR Path book. If you can get to one of his reviews you should do it.
Also his book is set to have a "re-printing" out in April. He has brought this up several times in lecture. I'm assuming it just has fixed errata in it.