I have evaluate few Open source sql server monitoring service
which able to monitor 10 free device , without installing any agent on the server. Currently still testing and haven't test the sql server monitor services yet.
Tedious to add device, simple and able to monitor event viewer, sql server
3. Using SQL server express 2005 Management Software to managed the sql 2000. Looks like the sql 2000 mangement looks updated but unfortunately it doesn't support sql 2000 compatible mode 6.5