It is not the name that is written (Mohammed) "the Messenger,... , whom they find written " meaning the messenger is referred to in those books. As for the references themselves, they are not a set in stone (as they shouldn't be) they are only references. Each group try to apply their beliefs on the subject. Feel free to waste your time. http://www.answering-christianity.com/prediction.htm
A word of advice, if you want to "find" something, you should start with the main subjects... with the basics.