actually what he's saying is download a prehacked itemrt.gsl that will already have the hacked items added to it. What hacking the itemrt.gsl file does, it allows every item that is dropped in a certain area while using a certain character type with a certain type of ID(like Greenill or Skyly cant remember what its actually called) to be whatever weapon that you hack into the itermrt.gsl.
A much easier way to hack items is to hack your default.xbe file and look for the new character offsets for every character type, like Humar, Fomar, etc, and change what the starting items are. You can changer your starting weapon, armor, mag, and two additional items, whatever you want them to be. I wish I could find the post that had the actual offsets for all the different character classes, because I dont believe its in the sticky.