@blade1266 at the moment there are currently no hacks out on MPGH, Spark is working on getting it back up and running.
It's easy to hack your way through those quests. Just do the same with the injectors like in GunZ. But instead, set the injection destination to MapleStory.exe or GameLauncher.exe depending the the Injector that you use. Then choose the .dll and open up MapleStory. Now for the quests, I just suggest using Godmode for it. That's it.