CONFIG00.DAT
From Populous Wiki
Stores all of the games settings, including the ones using the cheat/debug menu.
Graphics Settings
Resolution
0x0 is the resolution it is a byte. Its ordered in lowest resolution (640 x 480) to highest resolution of your monitor. This is probably the most simplest, but complex setting in this list.
Example: 0 = 640 x 480 1 = 800 x 600
and the rest of the values you'll have to pull from the monitor.
Sky (ON/OFF)
OFFSET(dec): 69
Notes: ON = 150, OFF = 22
Foot Steps (ON/OFF)
OFFSET(dec): 74
Notes: 128 = ON, 129 = OFF
Reduce Screen (ON/OFF)
OFFSET(dec): 168
Notes: 0 = OFF, 2 = ON
High Quality Textures (LOW/HIGH)
OFFSET(dec): 172
Notes: 16 = LOW, 144 = HIGH
Gamma
OFFSET(dec): 151 152
Notes:
151 0 - 255 (Starts at 76)
152 Each time 151 passes 255 151 value + 1 and 151 changes to 0
Sound Settings
Sound (ON/OFF)
OFFSET(dec): 43
Notes: 1 = ON, 0 = OFF
Sound (VOLUME)
OFFSET(dec): 129
Notes: 0 - 127 (0 = 0%, 127 = 100%)
Music (ON/OFF)
OFFSET(dec): 44
Notes: 1 = ON, 0 = OFF
Music (VOLUME)
OFFSET(dec): 130
Notes: 0 - 127 (0 = 0%, 127 = 100%)
Sound Quality (LOW/HIGH)
OFFSET(dec): 176
Notes: 0 = LOW, 4 = HIGH.
Game Settings
Tooltips (EXPANDED/SCROLLING)
OFFSET(dec): 137
Notes: 3 = EXPANDED, 7 = SCROLLING
Rotation (CURSOR/CTRL CURSOR)
OFFSET(dec): 149
Notes: 3 = CURSOR, 35 = CTRL CURSOR
Flip Rotation (ON/OFF)
OFFSET(dec): 141
Notes: 11 = ON, 3 = OFF
Stay Selected (ON/OFF)
OFFSET(dec): 145
Notes: 3 = ON, 19 = OFF
Autocast Spell (ON/OFF)
OFFSET(dec): 133
Notes: 3 = ON, 1 = OFF
Debug Settings 'O'
Covers the rest of the file, but I'm personally not going to go though all 73 of them and see what saves and what doesn't. I know Draw Objects and things save but I'm ending my journey here.