This cheat is only to be used when you start a new game.To 
do this money cheat, you need a hex editor. If you don't
have one, goto www.bpsoft.com and download Hex Workshop.
Go into a new game and save it right at the beginning. Exit
and go into Hex Workshop or what ever your hex editor is.
Open up the savegame. The directory is \xcoma\savegame\. The
file should be in a savegame.00 or savegame.01, what ever
you saved it to. So if you saved it to slot 5, it would be
savegame.04 and so on. Search for this string "E02202" then
replace it with (starting from where the E was) "FFFFFF7F".
Save it then quit and go back into your game. Once you load
it, you should have $2 billion+ to use. That should be 
enough to get through the whole game.