This cheat modifies health & basic 6 stats in a single player game:

1. After creating the team, start new game and save the game. Or add new charater to your party and save the game.

2. Open the saved game (.sav) using hex editor. (it's easier to use file date/time property to find the right saved game)

3. Do ASCII search to find your character.

4. Health

=> look for your health in hex.

eg. if your health is 10/10, look for hex in the format of
0a 00

00

00 0a

and change two 0a to the value you want (usually you can find this close to your character's name).

5. Six basic stat.

eg. if you stat are (from str) 13, 12, 13, 12, 14, 10 then look for the format of 0d 0c 0d 0c 0e 0a and change to anything you want as long as the value is under your race & class limit (usually this is located close to the end of your character info and right before next characters name).