Push default printer settings from server - setprinter.exe ?

Hi,

I need to push out some new default printer settings (mono and duplex) for 300 printers across about 12 x 2003/2008 print servers.  All of these devices are already mapped by around 2500 WinXP/7 users, so reconnecting the devices for everybody is not an option, nor is redeploying via GPO.  I've read the following thread, which appears to explain what I need to do:

http://social.technet.microsoft.com/Forums/en-US/winserverprint/thread/a0a9bb3f-db24-417d-9905-c310d068d3c6/ 

Firstly, I need the latest version of setprinter.exe, as the one I've got is date stamped April 2003, which I assume is the one that fails to work with devmode 9.  Does anybody know where I can get this from?

Secondly, I think it says that the clients will periodically update themselves with the server's default settings.  This is perfect, if correct.  However, would anybody please be able to explain when these periodic updates take place?

Many thanks in advance !

Andy