This link will take you straight to the download site, it is a 9.6MB file size, so be patient. You do have to log into the site to download it, don't worry about that, the registration procedure is very simple.
It is an exe file, so once you've downloaded it, make a new file for it, double click on it and it will open all the data into a file for you. Run add new printer and when it asks for the disk, point it towards were you've placed the data files.
The file the computer is looking for is probably an inf file.