I have a PC with a 3rd party program called eCopy which can be associated with .TIF/.TIFF files. When you Open the file, it opens fine with eCopy.
However, if you right-click the TIF file, and select Print... it opens using Microsoft Image and Fax viewer or MS Photo Printing Wizard on another PC.
I know how to change the default Open program. I've poked around in HKEY_CLASSES_ROOT, but cannot find how the change the program associated with the PRINT context-menu action for .TIF files.