Use a text editor such as Notepad to edit the .FDS file in the "/prison tycoon 2/data/maps " directory. Scroll to the bottom to find the lines:

< STATISTICS >
0,100000,0,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
< /STATISTICS >

Edit the second number to reflect the amount of money you want. For example, $900,000,000 would be:

< STATISTICS >
0,900000000,0,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
< /STATISTICS >

Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Save the game.