Chris Cairns sent Brian an email a while back with a novel printing fix / workaround for printing to unsupported printers. It's an open source project called PDFCreator. All you have to do is install it on the terminal server and the client. All of the configuration is done on the client’s computer, including the ability to save directly to a file without prompting the user and then to automatically print that saved file to a printer. Thus the user can now print directly to their unsupported printer without any additional steps. (This is better than some of the older PDF Writer-style solutions that required the user to "print" twice--once on the server and once on the client.
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An added bonus is that the user can use it to print and email PDF documents.
This isn't the most elegant solution, but your users can be printing to unsupported printers within the next ten minutes. (No server reboot is required!)