Hmmm...a slight problem

What program is used to edit cfg. files?
im trying to add a weapons effects to a fighter i have.
and the instructions say " Edit cfg. file to say _______(the blank is whati need to do) "
so i need a program to edit the cfg. file
im trying to add a weapons effects to a fighter i have.
and the instructions say " Edit cfg. file to say _______(the blank is whati need to do) "
so i need a program to edit the cfg. file