Hello Sorry but did not work for me, here is what I got,

Adding 'domain\user' to the 'sysadmin' role on SQL Server instance 'SQLEXPRESS'.

Verify the 'MSSQL$SQLEXPRESS' service exists ...

[SC] EnumQueryServicesStatus:OpenService FAILED 1060:

The specified service does not exist as an installed service.

'MSSQL$SQLEXPRESS' service is invalid

'domain\user' was NOT added to the 'sysadmin' role: SQL return code is N/A.

I have SQL Server 2008 Standard Edition and its a named instance. It will still work?

Where do I have to find and replace?