Big Money

1st)
make a savegame

2nd)
open the "SAVEGAME" with a hex editor (HexWorkshop)

3rd)
set offset 0000006A -FF
set offset 0000006B -FF
set offset 0000006C -FF
set offset 0000006D -C9
set offset 0000006E -9A
set offset 0000006F -3B

Now you will have $ 999,999,999 to make everything you want.