Specify Printer Driver via script or Managed Preferences

Hello All, please excuse me if I don't sound like I know much about what I'm doing. I'm relatively new to Mac and not really sure what I'm doing. At my school we have approximately 800 Macs running a mix of 10.5.8 and 10.6 being managed by an OS X Server. The managed workgroup works mostly ok. We are a mixed PC and Mac school and all of our expertise is in the PC area with only a little Mac. We have recently added a few new printers. The printers appear in the printers list on the managed Macs, but they are set to use a "Generic PCL Driver" rather than the specific driver required. I can push the installation of the driver package via Apple Remote Desktop. This works fine. However, I cannot figure out how to push the specification of the printer driver to the 800 student Macs. This is what I'd like to do. I thought I could just set the driver under managed preferences, but this doesn't seem to work. Or perhaps I just did it wrong and need to find out how to do it right. If I could push a script to run on each Mac which would specify that PrinterX to use DriverY then that would be great. Either way, I'd prefer not to have to get 800 Macs into my office and manually configure the drivers. I have already had to do about 50 of these and my head is already spinning. Any assistance that could be provided would be greatly appreciated. Many thanks in advance, Chris.