need help in far cry

hello agin

im trying to play with cheats for the game , you know ...health cheat :D any way its say that i have to do this

start a Far Cry game by adding -devmode at the end of the games's executable ?

now wher i put it ?? can some one show me in what file in the game files i have do i put it ?

i geeting my ass kicked so fast in this game (im a ps2 player not so a pc) please help me please

thx for all