Frms are for Fallout 2. Fallout 2 uses only 6 directions. Fallout tactics uses 8.
If you want 8 directional graphics from FOT, just extract your archives from your installation directory.
The installation type you chose when installing the game, may mean you won't have as great of a selection of archives.
I couldn't derive from your post, what it is that you want these 8 directional graphics for. With a program known as Blender, you can animate your model to rotate in 8 directions and render out the result into a sequence of images.