There are 4 pages of answers as well as the readme file.
Why does nobody read the readme file?
The image files (that's anything that ends in a png or is a black and white picture) go into the "TEXTURES" folder. You can find it in "MEDIA" which can be found in "FERALHEART".
The .cfg file (that's the file that is NOT an image file and may look like a note-pad) goes into the "FERALHEART" folder. Your computer will prompt (that means show a pop-up and ask) you to over-write and existing file. Hit the "YES" button.