PTF stands for Preset Transfer File. For releases between 8.0 and 8.5v1, these files are the best method of installing ICC profiles into your system. (8.5v1 eliminated the use of PTF when transferring ICCs)
From either the File menu, or Default Job Properties, look for an option that states something similar to "Install Presets" (I apologize in advance, I am doing this from memory). Select your printer setup and your downloaded PTF in the opened dialog box and install. All files will automatically be installed in their proper location. When you re-open the Default Job Properties and RIP & Print after installation, your new ICC will be accessible.
Steven Rife
Beacon Graphics
www.beacongraphics.com