So these are the last few lines of SQL2000-KB960082-v8.00.2055-x86-DEU.log:

3.296: Inventory complete: ReturnStatus=0, 218 ticks
3.296: SQL DLL: Entered callback ConfirmInstallation()
3.296: SQL DLL: Enumerating active product instances
3.296: SQL DLL: There were 0 product instances added to the execution list
3.296: SQL DLL: Error, no instances were found which can be currently
serviced by this patch. Terminating patch process.
3.296: SQL DLL: Instance Status Summary
3.296: SQL DLL: Instance Status: SBSMONITORING - NA
3.296: SQL DLL: Instance Status: SQLTools -
3.296: SQL DLL: ConfirmInstallation() returned 11300
3.296: DoInstallation: ConfirmInstallation Failed: 0x2c24
3.343: SQL DLL: Entered callback EndInstallation()
3.343: SQL DLL: EndInstallation() returned 0
3.343: SQL DLL: Entered callback FailedInstallation()
3.343: SQL DLL: Instance Status Summary
3.343: SQL DLL: Instance Status: SBSMONITORING - NA
3.343: SQL DLL: Instance Status: SQLTools -
4.125: SQL DLL: Watson: Param1 = Unknown
4.125: SQL DLL: Watson: Param2 = 0x2c24
4.125: SQL DLL: Watson: Param3 = Unknown
4.125: SQL DLL: Watson: Param4 = Unknown
4.125: SQL DLL: Watson: Param5 = Unknown
4.125: SQL DLL: Watson: Param6 = Unknown
4.125: SQL DLL: Watson: Param7 = SQLServerClient
4.125: SQL DLL: Watson: Param8 = Update.exe@6.2.29.0
4.125: SQL DLL: Watson: Param9 =
4.125: SQL DLL: Watson: Param10 = 2055
4.125: SQL DLL: FailedInstallation() returned 11300
4.125: Die Installation des KB960082(DEU) wurde nicht abgeschlossen.
4.125: Update.exe extended error code = 0x2c24

In the meantime I put my question as well in the newsgroup you mentioned
above. But also there, we didn't find a solution yet.

Lennart