A critter consists of many "frm" files. It's the standard graphic format used in Fallout. Basically, there are 2 different types of this format, each of them with unique extension:
Each of the frm/fr0-fr5 files represents a kind of animation. Name of the frm files designate the type of animation (see table below).
Note: *.fr0-*.fr5 files take precedence over *.frm!
(the last frame of knockdown and death anims)
2020-01-16 - Updated information and moved from readme.txt to html.
2007-07-22 - Written by Lisac2k