With FontViewOK can display, or use the fonts in other programs without install the font file.
The font is just Joined, when you restart the Windows, the font will be no longer displayed.
First, list the not installed Font from folder in "FontView OK". see FAQ-1: ... view (show) the not installed fonts
After you select the font with the right mouse button, in context menu simply select the option "Register without install" (see Image-1).
And already, the corresponding non-installed font can be used by other programs, if necessary the program must be started again.