The crazy thing is that I can change the special stuff you buy. For instance I sold moms panties before I got the extra energy, I was able to go in and change the value from 2 to 1 and it added it to inventory the next time I went in. It also allowed me to add the cow suit that I did not have. But it will not change the money or any stats damn it.
When the game loads it overwrites money, stats, etc into registry from the save file you just opened. Then it reloads these values from the registry each time you change locations. So if you change values when the game isn't running, it just overwrites them when you load a save or start a new game. The way to change them is with the game running and the save loaded, go to town map, switch back to Windows, open regedit, go to HKEY_CURRENT_USER\software\kstgames\thetwist, and change whatever you want - make sure you change from hex to decimal before change the number, go back to game, go to house and check your money/stats.