When you connect to MCMS 2002 DB in DCA you may get either SQL DMO needed / SQL SMO required error messages. To install SQL DMO and SMO with out installing the SQL server 2005 in the MCMS server machine,;
-Install backward compatibility tools for SQL server 2005 to install DMO
-Install SQL server 2005 Management object collection to install SMO
These components can be downloaded from
http://www.microsoft.com/downloads/details.aspx?familyid=d09c1d60-a13c-4479-9b91-9e8b9d835cdc&displaylang=en