Windows 7 - Disable restart after device driver installation

Hi SF!

I'm using Windows 7 Enterprise SP1 32-bit

I'm making a test equipment to test a USB device that uses a FTDI-chip (232R). This FTDI-chip has a S/N a Vendor ID (VID) and a Product ID (PID) along with many other settings.

My problem is:
1. I get a new USB device (not flashed in anyway) from the manufacturer, insert it into a USB port on the computer and windows install the standard device drivers included with this device (these are the same for every device) and no windows reboot message is visible.

2. Now I set the S/N, VID, PID to something I like, then I have to remove the USB device to set the settings. When I insert the device again Windows install the device drivers once again, but this time it prompts me with the message "Restart Now or Restart Later". I press "Restart Later" and the device works fine anyway... BUT Can I somehow get rid of this message?! It's very irritating to get the question on every unit I test..

It probably wants a restart to set the settings you put in and until you do the restart you will recieve the message

But it uses the same device driver and the device works perfectly well after. I got some hint about WHQL, that the standard settings are certified and when I change it Windows 7 wants a reboot because its not certified anymore. I could be way off.
But the major question still exist: Can I disable the restart option?