No output from zLOG.LOG on console window

Hi Developers

The installer of my custom content type used 'print' to output some 
messages. Unfortunately I have found out, that printing to the standard 
output does not seem to be threadsafe on a Windows box (especially when 
running as a service). Thus from time to time an error message appears 
"Error Type: IOError", "Error Value: [Errno 9] Bad file descriptor". The 
message can undoubtedly be related to a 'print' statement.

Anyhow, I thought that it would be better to output these messages to zLOG:

        import zLOG
        zLOG.LOG('SilvaDLCMS', zLOG.INFO, 'Copying file into silva core 
product:',
            'some/file/name' )

The message is nicely output to the 'event.log' but it is not displayed 
in the console window (as I hoped). I can not find out how the output 
device is selected, e.g. 'INFO(0) Zope Ready to handle requests' is put 
to the console and the logfile as well as 'PROBLEM(100) Silva Silva 
Documents requires upgrade...'. Others are output only to the log.file 
or the console. Is there a way to have my message on both, console and 
logfile?

Any suggestions?

Best regards
Sam