That driver seems to be missing, which of course you had to download and install. Could you tell us where and what package you have, so that we can take a look at it's installation methods?
Basically this is looking for the PDD file that this package is supposed to have installed. You have to browse to it and select it. I'm not sure where it is at until I can analyze the package. Then we need to know what the name of the PDD file is to be used.
If you know the name of the PDD file, you can search for it's location using terminal
note the results of the find and then select it in the printer setup.