Decrypting the data files

I don't really care about hacking this game, but I would however like to get some information from the data files within the game, just so I have accurate and in depth information about skills, classes, without actually having to perform this research in the game

What the patcher does, like many other games, is it downloads a bunch of files and puts them into a .pkg file. Some of these files contain information about items and such which I would like to obtain, and I managed to trace back to two different servers which store the original files:
ftp://ftp.fnonline.com.tw/NLBASE/201008250457/data/db/ (this is for the TW version)
http://edeneternal.patch.aeriagames....50457/data/db/ⓘ (same folder in English version so same files names, but this one doesn't allow directory listing so you have to manually access each file)

The problem now is, the files are encrypted and I don't have an kind of knowledge in this area so I don't know how to deal with this

I'm hoping someone here does

nice, it's utile for make an private server, no ?