WHAT?! lol.
Why the hell would you need to have your modified dll have anything to do with walker? If you know the new blowfish key then you just need to change L2Walker's default key to match, which btw is only used for the login, not the gameserver.
Grats to you for your share, I'm not trying to seem like one of the people you discribed in your post, but my only problem came when I saw "but it might be tricky cause of the login steps of this server..." which showed an extreme lack of knowledge or research with Sublimity's protection, and I have a problem with the large amount of people who come on here with a modicome of knowledge and brainwash all the 13 year olds into thinking they are god when 90% of the time they haven't actually done anything, however, I am not saying you are one of those people.