with @@version or better with : SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY ('productlevel'), SERVERPROPERTY ('edition') you can find out which version you are using.

Release Sqlservr.exe
RTM 2000.80.194.0
SQL Server 2000 SP1 2000.80.384.0
SQL Server 2000 SP2 2000.80.534.0
SQL Server 2000 SP3 2000.80.760.0

But.....how can i see the difference between MS SQL server 2000 Enterprise edition (personal edition) or MS SQL server 2000 Standard edition (personal edition)!!!!!!