Press the ~ key to drop down the console, and enter the following cheats: 
Make sure the word "cheat" is typed in before entering the commands.

Code - Effect 
cheat loonies - Get a crazy guy who can hold 2 tommys 
cheat alienprophets - Get fake cops 
cheat irissuxx - Message Yeah! 
cheat iwillmakethefamilyrich - Get 1 Lawyer 
cheat iwillripyourarmsoff- Get 1 Enforcer 
cheat youlittlehottieyou - Get 1 Seductress 
cheat pocketsfullofdough - Get 1 businessmean 
cheat yourliverlandedoverthere - Get 1 Bazooka guy 
cheat youhadbetterwearkevlar - Get 1 Blackwidow 
cheat trustmewithyourlife - Get 1 Bodyguard 
cheat ihavetenpoundfists - Get 1 Super Bouncer 
cheat likeatonofbricks - Get 1 bomber 
cheat youwillbestunned - Get 1 assassin 
cheat whatwasbrieflyyoursisnowmine - Get 1 thief 
cheat iwilltakecareofyou - Get 1 Big Momma 
cheat thegreatvassilizaitsev - Get 1 sniper 
cheat iknowodintoo - Get 1 ninja 
cheat kidiseeeverything - No fog of war 
cheat wowitsgreattobetheboss - God Mode 
cheat needmorelead - Get 1000 of everything 
cheat youbetterpay - Get 100000 cash