Autologin to Messenger

I recently implemented a Novell Messenger 2.2.2 system, which has been very well received. However, some of our directors would like a bigger takeup on usage of the system, roughly around 15% of users currently login on a daily basis. I know that you can set in GW to auto start Messenger when GW starts and also you can set it to start when Windows starts (or we could through the ZCM app), but I was wondering if anyone knows of a way of forcing a user to be actually automatically logged into Messenger when they login to their PC or GW??

Thanks
Mark.