Search and you will find.....
but anyways, First download KOF91 v1.1, KOF91v1.3 and KOF91 v1.4
I suggest installing KOF91 v1.1, then add the font files from the KOF91 v1.3 to the sprites(may or maynot have the s can't remember) folder. Then finally install KOF91 v1.4
By install I suggest reading the directions included in the zips