There is no upgrade path from MCSA/MCSE 2003, the exams required to finish that certification have been retired an also the upgrade exams to Server 2008 have been retired. There is ony an upgrade path for Server 2008 MCITP certification.
Your best option is to start with the MCSA: Server 2012 certification (3 exams)
https://www.microsoft.com/learning/en-us/mcsa-windows-server-certification.aspx
From there you can move on to MCSE: Server infrastructure by passing two additional exams:
https://www.microsoft.com/learning/en-us/mcse-server-infrastructure-certification.aspx
The MCSA exams have self-paced sudy books available from MS-Press that you can use, using video based training like CBT nuggets is also on option.
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Danny van Dam
MVP, MCC
