Hi Roy, The Sierra-Bates study guide has an attached CD-ROM. The CD-ROM includes a Master Exam and a link to register for the bonus Master Exam. I vaguely remember, after registering, LearnKey - the company that produces the CD-ROM - will send you a password so that you can download and install the bonus exam.
I just downloaded the exam and took it. I got 95% on it, but some of the questions were the same as the first exam. I am guessing that around five of the questions were also on the first exam. Do you think that this means I am ready to take the real exam?