Yes, that's it. Its strange, but these bytes seems to do nothing, and the jade id isnt there too. Btw, i found that jade id is shared by chiristmas amulet and elemental dual swords, so then it cant be reallly a id numer.
Then there are two posibilities:
1. Starting items are told by server. (But then how was able zereke to modify them, filtering received packets with WPE Pro? That would be only clientside)
2. We should look into another file.
I am posting what i found so we can share ideas and join our brains to find it out. If i dont find help here i just wont post more. And dont expect a tut if i found it, i will only tell how it is done to the ones who have helped finding out how to do this cheat.