Help with armor customization

Okay, this time I got it right.

In my current project after my old computer's hard drive crashed, I am using Charlie Lee's Weapon Enhancement Script(link below), as it changes the way most expect weapons to be used in typical RPGs such as the Final Fantasy series, where you must always buy weapons to get stronger. Since I added a weapon customization system, I wanted to add a similar one for armor, so I decided to alter the script, as permission is given to do so at the bottom of Lee's post to do so. Shortly after starting, however, I found myself way over my head and quit, deleting the screwed up script.

Now, I'm not requesting someone do this for me, I am asking if someone can walk me through how to alter this script, so I may learn more about scripting in general from the experience. However, if this is too big a job for this forum and should be a request instead, tell me and lock this thread, and I will post a request instead.

http://www.hbgames.org/forums/index.php?topic=33324.0 - link to Charlie Lee's weapon enhancement script.

And sorry post the edit, I had screwed the first post up badly, and decided to edit it to make it easier to understand.