You can't just set your HP and MP to whatever you want. Money...same thing. You have to find other ways to manipulate it such as find a way to prevent the routine that subtracts MP when you a skill from occurring.
might have to learn to hack and do it your self? lol you cant just hack HP SP money tho as Iktov said.
Im not sure how many people would download thiland files just to make a hack... lol