unreal tournament 3 split screen on pc

hello,

it is possible to do split screen on pc apparently. up to 4 players.

i need a bit more detailed instructions than those found on the web.

i need to know how to add each new player, and how to assign the controls for each player. i know it involves editing an ini file, but could someone translate what each command in the file does in the game? it's quite difficult to tell so i need this part explaining especially.

thanks