Question : Service Pack(SP3)

How can I find out if I am running SQL Server 2005 SP2 Cummulative update 10 or SQL Server 2005 SP2 Cummulative 11.
When I issue the commant: "SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY ('productlevel'), SERVERPROPERTY ('edition')" I only see: "9.00.3080.00  SP2  Standard Edition(64-bit).

Answer : Service Pack(SP3)

after installing the SQL Server 2005 SP2 Cumulative update 10 the build number will be  9.0.3294.0
and after installing the  SQL Server 2005 SP2 Cumulative update 10 the build number will be  9.0.3301.0

so your database is at an earlier state. It would be better that you should install service pack 3 rather than installing the cumulative updates unless a facing a problem that is not resolved in the service pack. Remember that the cumulative updates are not fully tested as the service packs.