I'm new to the world of certification, and I'm planning on doing the following exams:
First Exam: MCITP: Server Administrator
* Exam 70-640 -- TS: Windows Server 2008 Active Directory, Configuring
* Exam 70-642 -- TS: Windows Server 2008 Network Infrastructure, Configuring
* Exam 70-646 -- Pro: Windows Server 2008, Server Administrator
Second Exam: MCITP: Enterprise Administrator
* Exam 70-640 -- TS: Windows Server 2008 Active Directory, Configuring
* Exam 70-642 -- TS: Windows Server 2008 Network Infrastructure, Configuring
* Exam 70-643 -- TS: Windows Server 2008 Applications Infrastructure, Configuring
* Exam 70-620 -- TS: Configuring Microsoft Windows Vista Client
* Exam 70-647 -- Pro: Windows Server 2008, Enterprise Administrator
I'm looking for some general advice on the order to do the exams? What exams are the easiest to do/what exams are the most difficult? Any other general advice from people who have done the exams?
My background is in general desktop support and helpdesk work. I only have a little experience working on servers (mostly Win2003, zero experience on 200

. I'm currently unemployed at the moment, so I have lots of time in my hands.
The MS Press books appear to be the recommended study material from what I've read here and elsewhere. Are there any other recommended training materials? I was thing of using the Train signal vids as well.