Hint :
$500,000:
Type in MUCHCASH as your name and begin a game.

All Weapons:
Type in BIGGUNS as your name and begin a game.

Elvis Trick:
Drive around in a car,truck, or bus(the best kind to do it wit is a cop car or a z-type) until you see the Elvis impersonters. With out scaring them off, try to run them all over at the same time. If you did it right the screen will say ELVIS HAS LEFT THE BUILDING! By doing this you will recieve lots of money.

Quick multiple cheats:
If you would like to access more than one cheat at the same time than after entering your cheat on the name screen exit the name screen and go back into it again, delete the previous name and enter another cheat, and repeat the same routine untill have done all your cheats.