AS of right now I am taking the 4 core 70-210, 215, 216, 217. I am leaning towards 70-220 Designing Security for a Microsoft Windows 2000 Network, for my 5 core test. I am still very undecided on my electives. I am looking into Exchange 2000 server, because I hear it is widely used, but not many people know how to set it up properly. If I take 70-224 Installing, Configuring, and Administering Microsoft Exchange 2000 Server, should I also take 70-225 Designing and Deploying a Messaging Infrastructure with Microsoft Exchange 2000 Server, or should i go in a differant direction? Thanks