Cheat Edit

Using a HEX editor, edit ANY of your save games (files with RAL extensions).
Find the figures 00028000 (at 88BC7) and change to 01228000
The PowerDrive passwords are:
Round 2 - Kenya: YDV2KDKV5Q;2RDPB8
Round 3 - Sweden: YTV9KJV0146HJF8X-

Cheat Edit
To make all cars in PowerDrive cost $1:
search 30 30 30 32 35 30 30 30 FF 30 30 30 32 37 30 30 30 FF 30 30 30 33
change -- -- -- 30 30 -- -- 31 -- -- -- -- 30 30 -- -- 31 -- -- -- -- 30
search 34 30 30 30 FF 30 30 30 33 38 30 30 30 FF 30 30 30 36 32 30 30 30
change 30 -- -- 31 -- -- -- -- 30 30 -- -- 31 -- -- -- -- 30 30 -- -- 31
search FF 30 30 30 36 35 30 30 30
change -- -- -- -- 30 30 -- -- 31

*OR* you could search for: 00025000
Then, change each of the 7 numbers to: 00000001