That's what you get when you run the CD, It has the link to the web site which contains the Bonus Exam. If you've lost the CD, well actually I don't know any way you can get that from the authors or whether that is possible or not. May be someone else knows how to get it?
well Preetha if you have lost your CD, and if you don't have the Master Exam installed, then the bonus exam is of no use for you as it needs Master Exam to be pre-installed (as far as I know). Still this is the place where you can find the bonus exam.