ho trovato questo :

Unlock Cheat Menu:
Find the Wolf.cfg in your savegame folder. Typically located in C:\Documents and Settings\***USERNAME***\Local Settings\Application Data\id Software\WolfSP\base. Next, edit the file with a text editor and change the lines:

seta g_showCheatMenuMsg "0"
seta g_gameFinished "0"

to

seta g_showCheatMenuMsg "1"
seta g_gameFinished "1"

Save and close the file and when you start a new game the cheat menu will have been unlocked without having to beat the game.