If you mean starting money in skirmish mode, that's really easy. Assuming you have FinalBIG or some similar program to extract the right file, go to INIZH.big and extract multiplayer.ini - the bit you want is right at the bottom and should look something like this (this one's from my mod, the figures in yours will be different).
Code:
MultiplayerStartingMoneyChoice
Value = 10000
End
MultiplayerStartingMoneyChoice
Value = 25000
Default = Yes
End
MultiplayerStartingMoneyChoice
Value = 40000
End
MultiplayerStartingMoneyChoice
Value = 55000
End
MultiplayerStartingMoneyChoice
Value = 75000
End
MultiplayerStartingMoneyChoice
Value = 95000
End
AFAIK, you can have as many possible choices as you like.