3 times I've tried, each with less running. 3rd time I commented out all ZEN from autoexec.ncf, rebooted, shut down Java, still I get this:

Pre-install steps completed successfully
RMInv\3rdParty\SybaseNW Components NOT successfully installed on NETMGTA at :\ZENworks\Database\DBEngine
Error: There was an error installing ZENworks Desktop Management on NETMGTA. Error: Error copying files to server. Be sure that no ZENworks Desktop Management files are open or locked.

I've watched carefully. None of the files in that Database\DBEngine folder are open while the udpate fails. Could it be that the files in the SP1 udpate are all dated about an hour older than the files already in production? If that's so, shouldn't it ask me Y or N to overwrite?