I've done ADM templates to manage the PDFCreator settings per GPO.
Although I've published information about the way I've found to deploy PDFCreator manually.
Some feedback for the PDFCreator developers:
IMO it's not a good idea to make the printer settings user based the way you've done it.
PDFCreator printers are local printers. So IMO it would be okay to work only with machine based settings. And I think then it would be possible again to create a msi file for software deployment.