>I want to pursue a MCSD certification but there seems to be a hole in the MS training courses for two of the three core exams, 70-155 and 70-156. According to their MCSD Certification Requirements documents there are no courses or books currently available to prepare for these two exams. So, the question is, are there are third-party sources for this training? What about books or training materials?
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>What's the normal path that one would take to earning their MCSD certification using VFP?

See the Hentzenwerke site. Evan Delay and Cindy Winegarden wrote a book on the subject of preparing for the above mentioned subject.