I explain about how to break down the requirements for the MCDBA in this article:

http://qa.sqlservercentral.com/columnists/bkelley/gettingcertified.asp

Basically, there is a category for SQL Server Admin. You can either take the SQL 7.0 admin or the SQL 2000 admin exam in order to complete that category. That, the windows 2000 exam, and the elective will give you the MCDBA.

With respect to your SQL 7.0 Design, you'll hold the MCDBA certification until this exam is retired. This means at some point you'll need to take the SQL 2000 exam (or Yukon, if it is out), but other than that there isn't an issue with mixing SQL 7.0 and SQL 2000 to obtain your MCDBA.

K. Brian Kelley

http://www.truthsolutions.com/

Author: Start to Finish Guide to SQL Server Performance Monitoring

http://www.netimpress.com/shop/product.asp?ProductID=NI-SQL1