The PANTONE software basically consists of PANTONE color palettes that have been "tuned" for the Color LaserWriter 12/600 PS. The palettes have been created in application-specific file formats for the most popular desktop publishing applications that use the PANTONE color matching system. Loading these color palettes into the specified applications allows you to closely match screen colors to output colors on the Color LaserWriter 12/600 PS.
The PANTONE files for the Color LaserWriter 12/600 PS are available on online services.
This article can help you locate the software update mentioned here: