Various Hex Cheats:
Open up h3.cwg into your favorite hex editor then edit the following for different results:

offset 94 is your hp
offset 96 is your max hp
offset 98 is your mana
offset 9a is your max mana
offset 04f6 is your cash it works kinda in reverse i.e. 123456 is 563421 cash be careful editing your cash i had it move on me once and corrupted the file
81&85 are your STR one is current and one is max
82&86 are your INT one is current and one is max
83&87 are your CON one is current and one is max
80&84 are your DEX one is current and one is max

Experience is at 09e09f0a00a1 messing with this can have bad effects the following have to do with spells and their cost of mana... you will have to redo it after every level for best results. if you only do it once then when gain a level the cost of each spell will be normal for your level but you will retain all spells. by continuing to redo these following adjustments every time the cost should stay at 1 mana for every spell.
offset new value
01b201
01be01
01d601
01ca01
01e201
01ee01
01fa01
020601
021201
021e01
022a01
023601
024201
024e01
025a01
026601
027201
027e01
028a01
029601
02a201

Hint:
Use a spell over and over in a town, untill u get negitive 50 mana. sleep untill restored. then, do it again your hp will go to 164. save before trying this