Windows 7 printer drivers in Server 2003 environment problem

[CHiLL]

I've been having a specific problem on Windows 7 clients on our Server 2003 evironment. We have been testing Windows 7, and building a profile to work with it (all of our clients are on XP...but new systems will come with Windows 7). The profiles are all working, except when it comes to printers.

We have a vbs script which runs on logon, checks where the user is logged on, and assigns (and defaults) the correct printer for that room. It also deletes printers on log off. On Windows XP, this work flawlessly. However, coming to Windows 7 we encounter massive delays on logon times, caused by this:

"Do you trust this printer? Windows needs to download and install a software driver from the \\%servername% computer to print from %printername%. Proceed only if you trust the \\%servername% computer and the network."

The vbs scripts run sliently in the background, so the user cannot see this message to click Install driver, so it waits for it to time out and default to Cancel, and then it doesn't install the printer.

I have been researching this for a couple of days now, and I can't figure it out. I have tried using group policy for "Point and Print", allowing it in the forest and/or specified trusted servers, but that didn't work. Also tried using another Windows 7 machine to use GPO Management to disable warning messages, and that didn't work either. The messages still appear.

Any ideas?

[CHiLL]

Update;

Copying the script to the local machine and running it work. The printer installs without this popup message. So it seems to be something about it running from the server. However we have other scripts that run from that server (but don't install software, just change settings) and they work without a hitch.

Could it be something about it running from the UNC path? The server in question is classed as a Trusted Site in Internet Explorer because it's part of the local intranet, which is trusted.