Evolution 1.0 Service Pack 2 supports the following installation scenarios:
If you need to upgrade from a version of Evolution prior to 1.0 SP1 or from a version of Community Server, then you must first upgrade to Evolution 1.0 SP1, then apply SP2. The migration tools for Evolution 1.0 SP1 are well-proven and stable; this is the smoothest path for you to move to Evolution 1.0 SP2. You can find detailed instructions at http://docswiki.communityserver.com/wikis/product_documentation/upgrading-from-community-server-to-evolution.aspx.
If you are running SQL 2005, then run the SqlScripts/cs_UpdateSchemaAndProceedures.sql file. You can run this with tools such as the osql command line tool or SQL Management Studio.
At this time, the SQL patches included in SP2 are NOT compatible with SQL Server 2000. You can apply the binary updates and get the latest bug fixes; however, the performance changes in SP2's SQL scripts have not been ported back to SQL 2000.
If you have upgraded your Evolution install running on SQL Server 2000 to Evolution 1.0 SP1, then you can apply the binary files over the top of that installation.