1. Download the iso maker from crazycats website (http://crazycatz00.x10host.com/KH/)
2. Extract it and place your iso in that folder
3. Rename your iso to: "kh.iso"
4. Make an import folder and put all the patch files in it
5. Launch the program and press enter
6. Now use the "kh.NEW.iso" file to play your game
Good luck!
(I don't know if there is a easier way but I did it this way)
EDIT: You can also put the Final Mix English Font+Files in import (Also from Crazycats website)