Yep, when stuck like that, there's usually a way if you you take the trouble to search.

The ppd file btw is a plain text file. It basically describes what the printer can do and has some information about which programs to use. When I wrote an Android to CUPS app, one of the tasks I had was to try to write some form of parser for these files. If you look at one, you might see it tries to describe a user interface.