Vegas - Make it Big
When the game saves your progress in a slot it creates two files, one of
them is a plain text file. They are named slotx.cmb and slotx.cmf, the
plain text file is slotx.cmf, the x is for the slot number in the game.
Open the .cmf file in any text editor, notepad will suffice. Search for
currentcash, check that this is for player1 and simply replace the ammount
for however much you want. The file contains many variables for pretty
much everything but I'd imagine that the cash is all you'd need to alter
for easy gameplay.