Hey, what you are asking has been sort of discussed in the following threads. See if these help you.
http://www.usmle-forums.com/usmle-step-1-forum/3608-kaplan-material-2003-out-date.html
http://www.usmle-forums.com/usmle-step-1-forum/1781-kaplan-step-1-study-materials-2009-ok.html
http://www.usmle-forums.com/usmle-step-1-forum/3608-kaplan-material-2003-out-date.html
http://www.usmle-forums.com/usmle-step-1-forum/1781-kaplan-step-1-study-materials-2009-ok.html