These cheats have not been tested all the way, but they seem to work.
-- weapon cheats --
THUGSTOOLS - Weapons/Tools set 1
PROFESSIONALTOOLS - Weapons/Tools set 2
NUTTERTOOLS - Weapons/Tools set 3
-- personal cheats --
PRECIOUSPROTECTION - Armor
ASPIRINE - Health
ICANTTAKEITANYMORE - Suicide
CERTAINDEATH - Walks around with cigarette in mouth
-- wanted level cheats --
YOUWONTTAKEMEALIVE - Wanted level up
LEAVEMEALONE - Wanted level down
-- weather cheats --
APLEASANTDAY - Clear weather
ALOVELYDAY - Sunny weather
ABITDRIEG - Overcast weather
CATSANDDOGS - Raining weather
CANTSEEATHING - Foggy weather
-- ped cheats --
FIGHTFIGHTFIGHT - Peds fight each other
NOBODYLIKESME - Everyone attacks you
OURGODGIVENRIGHTTOBEARARMS - Give all peds weapons
FANNYMAGNET - Attract all girls
-- speed cheats --
LIFEISPASSINGMEBY - Time flies by
ONSPEED - Running speed way faster
BOOOOOORING - On drugs (use onspeed to remove)
-- car cheats --
BIGBANG - Destroy all cars
WHEELSAREALLINEED - Removes car frames
COMEFLYWITHME - Flying car
GRIPISEVERYTHING - Better handling
GREENLIGHT - Make all traffic lights green
MIAMITRAFFIC - Crazy traffic
AHAIRDRESSERSCAR - All cars pink
IWANTITPAINTEDBLACK - All cars black
SEAWAYS - Drive on water
-- cars -- PANZER - Tank
TRAVELINSTYLE - Bloodring banger
THELASTRIDE - Hearse
ROCKANDROLLCAR - Love Fist Limo
RUBBISHCAR - Trashmaster
GETTHEREFAST - Sabre Turbo
BETTERTHANWALKING - Golf cart
GETTHEREQUICKLY - Bloodring banger
GETTHEREVERYFASTINDEED - Hotring racer
GETTHEREAMAZINGLYFAST - Hotring facer
-- costumes --
LOOKLIKELANCE - Lance Vance
MYSONISALAWYER - Lawyer
ILOOKLIKEHILARY - Hilary King
ROCKANDROLLMAN - Love fist
WELOVEOURDICK - Lovefist 2
ONEARMEDBANDIT - One armed bandit
FOXYLITTLETHING - Mafiosi Daughter
CHEATSHAVEBEENCRACKED - Diaz
IDONTHAVETHEMONEYSONNY - Mafiosa