In the folder [game folder] / scripts / a2game / There is a file tuning.nut
Adrenaline 2: Rush Hour: Code (Lots of money) Free Download
It has lines like
{wheel_Res = “wheel_xx_DynModel”, preset = “xxx”, script = {level = xx, cost = xxxx,}},
The number after level = is like the required level to buy wheels, and after cost = this is the price. Change to a negative number (I bet -1000000), save the file and buy wheels in the game, getting money. There you can change the price and the required level for other details, including for adrenaline devices. Here.