BSS seems to not be so popular these days. you can get the paperback versions for DIRT cheap on Amazon now. I got perfectly clean versions for about $2 each (shpping is $ though). LOL! In the back of the book the questions are broken down by subject if you want to go over say all the pharm in Resp, CV, and Heme. There was not a breakdown by system.
I have the program CD and the books but will probably use the books. There are also PDF versions of the book out there. I only purchased the 3 system based books and skipped the 2 Normal process books. each book is 770 questions and add a Qbank I'm already sitting at 5K questions.