Installing External Tools
This options panel (Options > Program Options... from the main menu and then select External Tools) allows you to specify programs that can be launched for the currently highlighted file or folder.
Not only can you specify the arguments that will be passed to the program but also exactly which files the tools will be associated with on the popup and main menus.
In addition to programs you can also setup tools to access the Internet. Two of these tools come pre-installed one to Google for the program and the other to find information about files with the same extension.
FileBoss provides a related facility called Auto-Viewers that will be automatically called when one of their associated files is highlighted. Click here for more information about Auto-Viewers.