Me Personliy I like to cheat in these type of video game to all the guns, all ammo and end less health
I found cheats codes
but I don't know how to put them in
can somebody help me?

Edit the file AUTOEXEC.CFG (found in Kingpin's "Main" directory) and add the following line:
set developer 1
You may now enter the following codes by pressing the single quote (`) key while playing and typing the desired code in the console window.
* immortal -- immortality
* give all -- all weapons, ammo and health
* give weapons -- all weapons
* give health -- full health
* give cash -- 100 Dollars
* give armor -- full armor
* noclip -- walk through walls
* give (item) -- special item
* give (weapon) -- weapon
Hopefully that should work.

Cheats do work, but I dont use them a lot.
Note to self: Yes, I sucked hard at Quake.

Thanks Ralackk, the console works perfectly now. I've played through Kingpin enough times without codes to have earned to right to play with them. Theres nothing like starting a new game, doing the give all cheat and then flamethrowering/shotguning/tommy guning etc. in Skid Row. Priceless.