Nancy is the easiest mark. Generally if the character takes 4 cards, then stays, bet it all (as much as possible), and he/she will fold, giving you all the money.
NOTE: You will need to have the instructions book for this game to get the acount number.
Select the 'continue game' option from the main menu. Now look through the instructions book for the page on entering you name and account number. If you look carefully, you will see that the screen shot has a name and account number on it. Enter this name and account number to start with loads of extra cash!